The Vitamin Cure
By Monte Lai
()
About this ebook
Based on over 40 years of research and hundreds of leading studies, The Vitamin Cure is a comprehensive guide to improving overall health with vitamin and essential element therapies.
Modern medicine has done much in the field of acute conditions such as trauma, infections, burn, and bone fractures, but it has limited success in treating chronic diseases, such as Alzheimer's, Parkinson's, cancer, and diabetes among others. At present, the root causes of most chronic diseases are still unknown, and the drugs developed by pharmaceutical companies to treat chronic diseases actually treat only the symptoms rather than causes. According to Dr. Monte Lai, a nutrient deficient diet and unhealthy lifestyle are by far the two most important environmental factors associated with the causes of a host of chronic diseases. The Vitamin Cure provides a comprehensive overview of how vitamin and essential element therapies are the key to treating and preventing many of the chronic conditions.
While the internet is chock full of health related information about vitamins and essential elements, it is difficult to sort through all available information to build a reliable knowledge base to improve health. The aim of this book is to provide readers with easily accessible evidence-based knowledge about vitamins and essential elements for prevention and treatment of chronic diseases. The Vitamin Cure relies on a statistical method known as meta-analysis (combining data from multiple studies) that is currently the most reliable method for assessing the efficacy of vitamins or essential elements in preventing or treating chronic diseases.
The Vitamin Cure brings clinically proven remedies to light for any reader looking to improve overall health and prevent debilitating disease. This book contains five parts:
- Part one contains a brief history of the discovery of each of the thirteen essential vitamins, namely, vitamin A, vitamin B1, vitamin B2, vitamin B3, vitamin B5, vitamin B6, vitamin B7, vitamin B9, vitamin B12, vitamin C, vitamin D, vitamin E, and vitamin K. It also presents meta-analytic evidence of the efficacy of each vitamin in prevention and treatment of diseases, its recommended daily allowance and best food sources.
- Part two covers essential elements, including the five essential elements, i.e., calcium, potassium, sodium, magnesium and phosphorous, and the eight essential trace elements, i.e., iron, zinc, manganese, copper, molybdenum, iodine, chromium and selenium. It also presents meta-analytic evidence of the efficacy of each essential element in prevention and treatment of diseases, its recommended daily allowance and best food sources.
- Part three explains important secrets for staying healthy. These include explanation of how sugar makes you fat, why patients with autoimmune diseases should not eat meat, and how exercise benefits the brain?
- Part four provides meta-analysis evidence of which vitamins and essential elements should be taken to prevent and/or treat seventy-five chronic diseases and conditions. These seventy-five chronic diseases and conditions include lung cancer, breast cancer, colorectal cancer, prostate cancer, endometrial cancer, blood cancer, bladder cancer, glioma, diabetes, stroke, heart disease, cataracts, hypertension, Alzheimer's disease, osteoporosis, arthritis, hepatitis C, fatty liver disease, Parkinson's disease, sleep apnea, and others.
- Part five summarizes clinically proven remedies for preventing and treating the seventy-five chronic diseases and conditions presented in Part four.
Monte Lai
Dr. Monte Lai is formerly a professor of biophysics at the Medical College of Wisconsin, where his research focused on the field of free radicals in biology and medicine. Most recently, he was CEO of the pharmaceutical Medinox, Inc, focusing on the design and development of new pharmaceutical drugs. For the past two decade he has been at the forefront of the research on the pros and cons of therapeutic drugs in treating diseases and conditions. Currently he devotes his time to educating the public and medical community on ways to improve health and wellbeing.
Related to The Vitamin Cure
Related ebooks
Fire Your Doctor!: How to Be Independently Healthy Rating: 5 out of 5 stars5/5Doctor Yourself: Natural Healing That Works Rating: 4 out of 5 stars4/5No More Diabetes: A Complete Guide to Preventing, Treating, and Overcoming Diabetes Rating: 0 out of 5 stars0 ratingsSystemic Enzymes for Curing Modern Chronic Diseases Rating: 5 out of 5 stars5/5The New Super-Nutrition Rating: 0 out of 5 stars0 ratingsMagnesium: Reversing Disease Rating: 5 out of 5 stars5/5Modern Medicine for Modern Times: The Functional Medicine Handbook to Prevent and Treat Diseases at their Root Cause Rating: 0 out of 5 stars0 ratingsLive Better, Longer: The Science Behind the Amazing Health Benefits of OPC Rating: 4 out of 5 stars4/5The Vitamin Cure for Alcoholism: Orthomolecular Treatment of Addictions Rating: 3 out of 5 stars3/5The Vitamin Cure for Children's Health Problems Rating: 0 out of 5 stars0 ratingsSupplement Your Prescription: What Your Doctor Doesn't Know about Nutrition Rating: 0 out of 5 stars0 ratingsThe Alternative For Beating Cancer: Top Researched Therapies From Around The World Rating: 0 out of 5 stars0 ratingsNatural Cancer Cures: The Definitive Guide to Using Dietary Supplements to Fight and Prevent Cancer Rating: 5 out of 5 stars5/5Essentials of Nutrition: Good Nutrition Vs. Malnutrition Rating: 0 out of 5 stars0 ratingsBalance Your Health: Combining Conventional and Natural Medicine Rating: 0 out of 5 stars0 ratingsHealing Multiple Sclerosis, New Revised Edition: Diet, Detox & Nutritional Makeover for Total Recovery Rating: 2 out of 5 stars2/5The Vitamin D Cure, Revised Rating: 4 out of 5 stars4/5The Vitamin Cure for Arthritis Rating: 5 out of 5 stars5/5Vitamin D: Miracle Cure Rating: 4 out of 5 stars4/5The 10 Best Nutritional Supplements Rating: 0 out of 5 stars0 ratingsUser's Guide to Natural Therapies for Cancer Prevention and Control Rating: 5 out of 5 stars5/5The Ascorbate Papers, volume II: 1940-1949 Rating: 4 out of 5 stars4/5User's Guide to Vitamin C Rating: 5 out of 5 stars5/5The Vitamin Cure for Diabetes Rating: 4 out of 5 stars4/5Vitamin C: The Real Story: The Remarkable and Controversial Healing Factor Rating: 4 out of 5 stars4/5Orthomolecular Treatment of Chronic Disease: 65 Experts on Therapeutic and Preventive Nutrition Rating: 5 out of 5 stars5/5User's Guide to Coenzyme Q10: Don't Be a Dummy, Become an Expert on What Coenzyme Q10 Can Do for Your Health Rating: 5 out of 5 stars5/5
Diet & Nutrition For You
Thinner Leaner Stronger: The Simple Science of Building the Ultimate Female Body Rating: 4 out of 5 stars4/5The Diet Myth: Why the Secret to Health and Weight Loss is Already in Your Gut Rating: 4 out of 5 stars4/5Bigger Leaner Stronger: The Simple Science of Building the Ultimate Male Body Rating: 5 out of 5 stars5/5Muscle for Life: Get Lean, Strong, and Healthy at Any Age! Rating: 4 out of 5 stars4/5Gut: The Inside Story of Our Body's Most Underrated Organ (Revised Edition) Rating: 4 out of 5 stars4/5Intuitive Eating, 4th Edition: A Revolutionary Anti-Diet Approach Rating: 4 out of 5 stars4/5Glucose Revolution: The Life-Changing Power of Balancing Your Blood Sugar Rating: 5 out of 5 stars5/5How Not to Diet: The Groundbreaking Science of Healthy, Permanent Weight Loss Rating: 4 out of 5 stars4/5Mediterranean Diet Meal Prep Cookbook: Easy And Healthy Recipes You Can Meal Prep For The Week Rating: 5 out of 5 stars5/5Deep Nutrition: Why Your Genes Need Traditional Food Rating: 4 out of 5 stars4/5The Complete Medicinal Herbal: A Practical Guide to the Healing Properties of Herbs Rating: 4 out of 5 stars4/5Carnivore Cure: The Ultimate Elimination Diet to Attain Optimal Health and Heal Your Body Rating: 5 out of 5 stars5/5The Anti-Anxiety Diet: A Whole Body Program to Stop Racing Thoughts, Banish Worry and Live Panic-Free Rating: 0 out of 5 stars0 ratingsThe Obesity Code: the bestselling guide to unlocking the secrets of weight loss Rating: 4 out of 5 stars4/5The Forks Over Knives Plan: How to Transition to the Life-Saving, Whole-Food, Plant-Based Diet Rating: 5 out of 5 stars5/5
Reviews for The Vitamin Cure
0 ratings0 reviews
Book preview
The Vitamin Cure - Monte Lai
THE
Vitamin Cure
Clinically Proven Remedies to Prevent and Treat 75 Chronic Diseases and Conditions
MONTE LAI, PhD
www.humanixbooks.com
Humanix Books
The Vitamin Cure
Copyright © 2018 by Ching-San Lai
All rights reserved
Humanix Books, P.O. Box 20989, West Palm Beach, FL 33416, USA
www.humanixbooks.com | info@humanixbooks.com
Library of Congress Cataloguing-in-Publication data is available upon request.
No part of this book may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying, recording, or by any other information storage and retrieval system, without written permission from the publisher.
Interior Design: Scribe Inc.
Humanix Books is a division of Humanix Publishing, LLC. Its trademark, consisting of the word Humanix,
is registered in the Patent and Trademark Office and in other countries.
Disclaimer: The information presented in this book is not specific medical advice for any individual and should not substitute medical advice from a health professional. If you have (or think you may have) a medical problem, speak to your doctor or a health professional immediately about your risk and possible treatments. Do not engage in any care of treatment without consulting a medical professional.
ISBN: 9781630060954 (Trade Paper)
ISBN: 9781630060961 (E-book)
In memory of Lawrence H. Piette
ACKNOWLEDGMENTS
This book is a culmination of over forty years of my academic and industrial work in which I engaged with an aim to find ways to improve health and wellbeing of the public. My interest in antioxidant vitamins dates back four decades when I was pursuing my Ph.D. degree in biophysics in late professor Lawrence H Piette’s lab in Honolulu, Hawaii. Professor Piette who was the pioneer in the field of free radicals in biology and medicine was my mentor and inspiration in science. This book is dedicated to him.
I would like to thank all the people who provided their time and valuable advices when I worked in the pharmaceutical industry in San Diego. It is not possible to mention them all here, Timothy R. Billiar, M.D., Mike Ziegler, M.D, Marv Rosenthal, Ph.D., Chung Y. Hsu, M.D, Ph.D., George Gill, M.D, Fu-Tong Liu, M.D, Ph.D., Ferid Murad, M.D., Ph.D., the late Mitchell Fink, M.D and the late Leonard Arthur Herzenberg, Ph.D.
I also would like to express my appreciation to Ron Epstein, Ph.D. and Larry Wade for reading a part of the manuscript. This book would not be possible without relentless support and love of my son Shawn and my dear friend Hena Hsu. I wholeheartedly appreciate their enthusiasm and encouragement throughout the course of this work.
Poison is in everything, and nothing is without poison. The dosage makes it either a poison or a remedy.
Paracelsus (1493–1541)
Father of Toxicology
CONTENTS
Acknowledgments
Introduction
Part One: Vitamins
1. Vitamin A (Retinol)
2. Vitamin B1 (Thiamine)
3. Vitamin B2 (Riboflavin)
4. Vitamin B3 (Niacin)
5. Vitamin B5 (Pantothenic Acid)
6. Vitamin B6 (Pyridoxine)
7. Vitamin B7 (Biotin)
8. Vitamin B9 (Folic Acid)
9. Vitamin B12 (Cobalamin)
10. Vitamin C (Ascorbic Acid)
11. Vitamin D (Sunshine Vitamin)
12. Vitamin E (Alpha-Tocopherol)
13. Vitamin K (Phylloquinone)
Part Two: Essential Elements
14. Calcium
15. Potassium
16. Sodium
17. Magnesium
18. Phosphorus
19. Iron
20. Zinc
21. Manganese
22. Copper
23. Molybdenum
24. Iodine
25. Chromium
26. Selenium
27. Omega-3 Fatty Acids
Part Three: Secrets for Staying Healthy
28. How Does Sugar Make You Fat?
29. Why Should Patients with Autoimmune Diseases Not Eat Meat?
30. Who’s Coming to the Party? Free Radical, a Persona Non Grata
31. What Are Free Radicals?
32. A Personal Story of the Hunt for the Hydroxyl Radical
33. What Are Antioxidants?
34. How Does Exercise Benefit Brain Health?
35. Why Are Fruits and Vegetables Good for Your Health?
36. What Is Aging?
Part Four: Prevention and Treatment of Diseases and Conditions
37. Alzheimer’s Disease
38. Asthma
39. Atherosclerosis
40. Atrial Fibrillation
41. Attention-Deficit/Hyperactivity Disorder
42. Autism Spectrum Disorder
43. Autoimmune Thyroid Disease
44. Bladder Cancer
45. Blood Cancers
46. Bone Fractures
47. Breast Cancer
48. Cardiovascular Disease
49. Cataracts
50. Cervical Cancer
51. Cervical Intraepithelial Neoplasia
52. Chronic Kidney Disease
53. Chronic Obstructive Pulmonary Disease
54. Chronic Pancreatitis
55. Cognitive Impairment
56. Colorectal Cancer
57. Coronary Artery Disease
58. Depression
59. Type 1 Diabetes
60. Type 2 Diabetes
61. Dry Eyes
62. Eczema
63. Endometrial Cancer
64. Esophageal Cancer
65. Exercise-Induced Bronchoconstriction
66. Fatty Liver Disease
67. Fibromyalgia
68. Gestational Diabetes
69. Glaucoma
70. Glioma
71. Gout
72. Graves’ Disease
73. Heart Attack
74. Heart Failure
75. Hemodialysis
76. Hepatitis C
77. Hypercholesterolemia (High Blood Cholesterol)
78. Hypertension (High Blood Pressure)
79. Inflammatory Bowel Disease
80. Kashin-Beck Disease
81. Liver Cancer
82. Lung Cancer
83. Lupus Erythematosus
84. Age-Related Macular Degeneration
85. Male Infertility
86. Melanoma
87. Metabolic Syndrome
88. Migraine
89. Multiple Sclerosis
90. Neural Tube Defects
91. Obesity
92. Oral Cleft
93. Orthostatic Hypotension
94. Osteoporosis
95. Pancreatic Cancer
96. Parkinson’s Disease
97. Preeclampsia
98. Premature Mortality
99. Prostate Cancer
100. Renal Cell Cancer
101. Respiratory Infections
102. Rheumatoid Arthritis
103. Rickets
104. Schizophrenia
105. Sepsis
106. Sleep Apnea
107. Stomach Cancer
108. Stroke
109. Tuberculosis
110. Venous Thrombosis
111. Vitiligo
Part Five: Summary of Recommended Daily Doses of Vitamins and Essential Elements for Prevention and Treatment of 75 Diseases and Conditions
Author’s Publications
References
Glossary
Abbreviations
Index
INTRODUCTION
In the 1970s, Linus Pauling, a two-time Nobel laureate, recommended large doses of vitamin C to prevent and cure cancers. He himself was taking 8 g of vitamin C daily, and he was fit and healthy well into his 70s. Pauling’s claim received tremendous media attention; he was frequently in the news. During that time, I was a graduate student pursuing my PhD in biophysics in Honolulu, Hawai‘i. Pauling’s media exposure was of particular interest to me because my dissertation investigated free radicals and antioxidants. High-dose vitamin C produces hydrogen peroxide, which kills cancer cells in the body. Recently, the National Institutes of Health (NIH) recommended intravenous high-dose vitamin C injections as a form of cancer therapy for treating certain advanced stages of cancer. Owing to my own research work, I had already become aware of the ways in which antioxidants like vitamin C and vitamin E work to scavenge harmful free radicals (molecules with unpaired electrons) in the body.
I continued my research work in the field of free radicals in biology and medicine after I joined the Medical College of Wisconsin in Milwaukee as a faculty member, devoting my research to nitric oxide, a gaseous free radical that is crucial for countless aspects of human health, ranging from the heart to the reproductive organs. In 1995, while taking a sabbatical leave, I decided to resign from my position as a full professor of biophysics at the medical school and serve as president and CEO of a new pharmaceutical company, focusing on the design and development of new drugs, in San Diego. Over the past two decades, I have acquired extensive knowledge in the pharmaceutical field by being at the forefront of the research on the pros and cons of therapeutic drugs in treating diseases and conditions.
Diseases and conditions can be divided into categories of acute and chronic. Modern medicine has done much in the field of acute conditions—such as trauma, infections, burns, bone fractures, or migraine attacks—but it has had limited success in treating chronic diseases like Alzheimer’s, Parkinson’s, or diabetes, among others. Therapeutic drugs for chronic diseases are largely designed to treat symptoms rather than causes.
Take type 2 diabetes as an example: Most diabetes drugs can lower blood glucose. But high blood glucose is a symptom, not a cause, of type 2 diabetes. Compare this to how a fever is a symptom rather than the cause of an infection—bacteria or viruses are the causes. Antipyretic agents that prevent or reduce fever, such as naproxen or acetaminophen, may control the fever, but they cannot eradicate the pathogen that causes the infection—the agents treat only the feverish symptom, not the causative pathogen. Likewise, diabetes drugs treat only the symptom of high blood glucose, not the cause of type 2 diabetes.
At present, the root causes of most chronic diseases are still elusive. Both genetic and environmental factors are known to play pivotal roles in etiologies of chronic diseases. Chronic diseases are often related to gene mutations. A single gene mutation rarely causes chronic disease; although people who carry a hereditary mutated gene may be at an elevated risk, it does not mean that they will inevitably suffer from the disease. Environmental factors are known to affect epigenetics (how our genes interact with the environment) as well as trigger the expression of predisposed hereditary genes. A nutrient-deficient diet and an unhealthy lifestyle are by far the two most important environmental factors associated with the causes of a host of chronic diseases. Conversely, a nutrient-rich diet and a healthy lifestyle can stave off chronic diseases.
You may have browsed through the internet or read a newspaper and found an article claiming that vitamins are effective in treating diseases. Yet several months later, you may have seen another news report make the opposite claim, suggesting that vitamins are not only useless but also possibly harmful to health. You might not know what to believe anymore. I am certain many people feel this way. Nowadays, information is readily available on the internet. With just a few keystrokes, you can find ample health-related data about vitamins and essential elements. Nevertheless, it is difficult to sort through all the available findings to build a reliable knowledge base that will improve your health and that of your loved ones. The aim of this book is to provide you with easily accessible, evidence-based knowledge about vitamins and essential elements for the prevention and treatment of chronic diseases.
Before you dive into the contents of the book, you need to know how clinical data are generated. First, several kinds of clinical studies exist. Let us start with the simplest one. A doctor prescribes vitamins to treat a patient suffering from a disease, and after taking vitamins for a few months, the patient recovers from the illness. The doctor publishes his findings in a scientific journal. This is called a case study.
If the doctor prescribes vitamins to a group of patients rather than a single patient and publishes his findings in a scientific journal, that is called an observational study.
On the other hand, if the same doctor publishes the findings of a study in which he divides his patients into two groups, in which one group receives vitamins and the other group receives a placebo, and neither the doctor nor the patients know who is taking vitamins and who is taking the placebo, that is called a randomized controlled trial.
Many doctors and scientists worldwide are conducting clinical studies to test the effectiveness of vitamins for preventing or treating chronic diseases. For example, in the past 10 years, at least eight clinical studies have been published on the use of vitamin D for the prevention of osteoporosis. Although their topics and design might have been similar, these eight clinical studies produced different results and conclusions due to factors like patient selection, dosage, environment, and the like. Can vitamin D prevent osteoporosis? Of those eight clinical studies, which one should you believe?
Fortunately, a statistical method known as meta-analysis has been widely used to assess the efficacy of pharmaceutical agents in treating diseases. In the case of the abovementioned example, a meta-analysis would combine all the clinical data obtained from those eight clinical studies, excluding the data deemed to be biased, and analyze the remainder of the combined data to reach a statistical conclusion on whether vitamin D can or cannot prevent osteoporosis. Meta-analysis is currently the most reliable method for assessing the efficacy of vitamins or essential elements in preventing or treating chronic diseases. All the information on how vitamins and essential elements prevent and treat chronic diseases in this book is based solely on meta-analyses published in peer-reviewed scientific journals, not any single clinical study report.
This book contains five parts. Part 1 contains a brief history of the discovery of each of the 13 essential vitamins—namely, vitamin A, vitamin B1, vitamin B2, vitamin B3, vitamin B5, vitamin B6, vitamin B7, vitamin B9, vitamin B12, vitamin C, vitamin D, vitamin E, and vitamin K. Part 2 covers essential elements, including the five essential elements—calcium, potassium, sodium, magnesium, and phosphorus—as well as the eight essential trace elements, which are iron, zinc, manganese, copper, molybdenum, iodine, chromium, and selenium. Both parts 1 and 2 also present meta-analytic evidence of the efficacy of each vitamin/essential element in the prevention and treatment of diseases, its recommended daily allowance, and best food sources of it. Part 3 provides important secrets for staying healthy. These include an explanation of how sugar makes you fat, why patients with autoimmune diseases should not eat meat, and how exercise benefits the brain. Part 4 provides meta-analytic evidence of which vitamins and essential elements should be taken to prevent and/or treat 75 chronic diseases and conditions, including lung cancer, breast cancer, colorectal cancer, prostate cancer, endometrial cancer, blood cancer, bladder cancer, glioma, diabetes, stroke, heart disease, cataracts, hypertension, Alzheimer’s disease, osteoporosis, arthritis, hepatitis C, fatty liver disease, Parkinson’s disease, sleep apnea, and others. Part 5 summarizes the clinically proven remedies for preventing and treating the 75 chronic diseases and conditions presented in part 4.
For the purpose of easy reference, all vitamins, essential elements, secrets for staying healthy, and diseases in this book have been assigned a specific chapter number: vitamins are numbered from 1 to 13, essential elements from 14 to 27, secrets for staying healthy from 28 to 36, and diseases from 37 to 111. For example, vitamin A is 1, calcium is 14, and Alzheimer’s disease is 37.
Author’s disclaimer: The book provides readers with relevant health information about vitamins and essential elements, but it does not intend to be a substitute for any medical advice given to readers by health-care professionals. Efficacies of vitamins and essential elements in preventing or treating diseases may vary greatly among individuals. Recommendations from the book should not replace any nutrient-balanced diets or prescribed medications.
PART ONE
Vitamins
Vitamins are essential nutrients that the body does not make; therefore, they have to be obtained from foods. Some vitamins are derived from animal-based foods, while others are from plant-based foods. Only by consuming nutrient-balanced foods can one obtain sufficient amounts of all 13 vitamins—vitamin A, vitamin B1, vitamin B2, vitamin B3, vitamin B5, vitamin B6, vitamin B7, vitamin B9, vitamin B12, vitamin C, vitamin D, vitamin E, and vitamin K—to maintain good health. These 13 vitamins are distributed to various organs and tissues, and each one is involved in a multitude of essential physiological functions in the body. Vitamin literally means being vital for life.
1
VITAMIN A (RETINOL)
Vitamin A is also known as the anti–dry eye vitamin. In 2000 BCE, physicians in ancient Egypt and Greece already knew that beef liver could cure night blindness. Of course, they had no way of knowing that this was because beef liver contains high amounts of vitamin A. In 1913, Lafayette Mendel and Thomas Osborne were able to isolate a lipid-soluble
substance from chicken eggs and fish liver and called it vitamin A. In 1930, the chemical structure of vitamin A was identified as retinol.
Vitamin A enhances vision, allowing us to differentiate people from objects in our surroundings in dim light. In the eye, vitamin A binds to opsin, a photosensitive protein, to form rhodopsin. The photosensitivity of rhodopsin essentially establishes our eyesight and vision.
Vitamin A is also called the anti-infective vitamin.
The body’s first-line defense against infections involves the skin, respiratory tract, digestive tract, and urinary tract. Vitamin A activates immune cells in these tissues.
Since our bodies cannot make vitamin A, it has to be obtained from foods. Preformed vitamin A and provitamin A are two kinds of vitamin A found in foods. Vitamin A from animal-based foods, such as beef liver, is preformed vitamin A, which the body uses promptly. Plants, such as carrots, contain carotenes. Carotenes are made up of provitamin A, which must be converted to vitamin A in the digestive tract before our bodies can utilize them.
What Are the Symptoms of Vitamin A Deficiency?
• Xerophthalmia. Xerophthalmia, or abnormal dryness of the conjunctive cornea of the eye, is the most common symptom in vitamin A–deficient children. Symptoms related to vitamin A deficiency in adults include night blindness and diminished adaptability of eyesight under dim light or at nighttime. In severe cases, patients might be afraid of driving or being outdoors alone at night because of their weakened vision.
• Eye disease and blindness. Severe vitamin A deficiency can cause blindness. Pregnant women deficient in vitamin A have an elevated risk of giving birth to babies with dry eye syndrome and even blindness. Globally, about half a million children suffer from blindness related to vitamin A deficiency; it is the most preventable cause of blindness in children. Hippocrates, the celebrated physician of Greek antiquity, told his patients who had eye diseases to eat cooked beef liver, which is rich in vitamin A.
• Infectious diseases. Infectious diseases can consume and deplete vitamin A stored in the liver, causing vitamin A deficiency. Measles infections depleting vitamin A can also lead to dry eye syndrome and xerophthalmia or even blindness in children.
• Thyroid malfunction. The thyroid gland produces thyroid hormones T3 and T4. T3 is the active form of the thyroid hormone, and vitamin A enhances the conversion of T4 to T3. Vitamin A deficiency can hinder this conversion and cause thyroid malfunction.
What Are the Causes of Vitamin A Deficiency?
• Lipid malabsorption. Lipids, or fats, facilitate the absorption of lipid-soluble vitamin A in the intestines, so lipid malabsorption can reduce the absorption of vitamin A, resulting in vitamin A deficiency. Lipid malabsorption is often caused by a blockage of pancreatic or gallbladder juice secretion, Crohn’s disease, celiac disease, or inflammatory bowel disease.
Prevention and Treatment of Diseases
• Prevention. Meta-analysis confirms that vitamin A can prevent lung cancer (82), bladder cancer (44), stomach cancer (107), glioma (70), cervical cancer (50), asthma (38), and cataracts (49).
• Treatment. High doses of vitamin A can be used as an adjuvant therapy for treating blood cancers (45).
Which Food Items Are Vitamin A Rich?
Beef liver and fish liver oil contain high amounts of vitamin A. Milk and eggs are also excellent sources of vitamin A. Vegetables and fruits contain high levels of carotenoids.
This list of food items that are rich in vitamin A and beta-carotene is adapted from information provided by the USDA.
Daily reference value of vitamin A is 5,000 IU according to the 2013 FDA food-labeling guidelines.
How to Calculate the Dosage of Vitamin A
International Units (IU) are commonly used to quantify vitamin A in food items and supplements.
• 1 IU of vitamin A is equal to 0.3 mcg of retinol
• 1 IU of beta-carotene is equal to 0.15 mcg of retinol
• 1 IU of beta-carotene in food is equal to 0.025 mcg of retinol
What Are the Recommended Dietary Allowances for Vitamin A?
The upper daily intake limit of vitamin A is 10,000 IU.
Vitamin A Supplements
• Dosage. The common dosage for vitamin A supplements ranges from 5,000 to 25,000 IU. Vitamin A supplements can be taken either daily or weekly. The recommended dose is 3,000 IU daily or 20,000 IU weekly.
• Types. Vitamin A supplements are mainly composed of retinol, retinyl acetate, and retinyl palmitate. Their weight-to-unit conversion factors are as follows:
◦ 0.3 mcg of retinol is equal to 1 IU of vitamin A
◦ 0.344 mcg of retinyl acetate is equal to 1 IU of vitamin A
◦ 0.55 mcg of retinyl palmitate is equal to 1 IU of vitamin A
• Fish liver oil. Fish liver oil contains vitamin A, vitamin D, and omega-3 fatty acids, including EPA (eicosapentaenoic acid) and DHA (docosahexaenoic acid). There are two types of fish liver oil supplements: regular and fermented. Fermented fish liver oil supplements are more expensive compared to regular fish liver oil supplements. The fermentation process enhances the contents and purity of vitamin A, vitamin D, and the omega-3 fatty acids. The vitamin A in fish liver oil is a natural retinyl palmitate, which is the same as synthetic retinyl palmitate.
• Melanoma. Vitamin A can prevent melanoma. Clinical studies have shown that taking a dose of 4,000 IU of vitamin A daily for six months reduced the risk of melanoma by 40%. The protective effect was more profound in women than in men.
• Wrinkles. Vitamin A reduces wrinkles, making older skin look younger. Topical vitamin A at a dose of 0.4% applied three times weekly was effective in reducing wrinkles within weeks.
Safety Issues
• Overdose. Long-term consumption of high doses of vitamin A may cause hypervitaminosis A. Symptoms include blurred vision, lack of appetite, dry skin, and muscle weakness. High doses of vitamin A can cause liver damage as well as osteoporosis.
• Pregnant women. During pregnancy, women should take no more than 25,000 IU of vitamin A supplement daily to avoid hypervitaminosis A, which can lead to birth defects in infants.
• Recommended daily dose. Vitamin A is lipid-soluble and, once absorbed, will be retained in the body for a long time. It is recommended that you take no more than 10,000 IU of vitamin A per day.
What Types of Drugs May Interact with Vitamin A?
• Alcohol can exacerbate liver damage caused by high doses of vitamin A. Drinking alcoholic beverages with beef liver slices as a side dish is prevalent in some Asian cultures, which can lead to vitamin A toxicity. Furthermore, cholesterol-lowering drugs that hinder lipid absorption may also diminish vitamin A absorption.
• Long-term consumption of high doses of vitamin A can decrease vitamin K absorption, leading to vitamin K deficiency. Vitamin A enhances the drug action of warfarin. People who take warfarin to treat and prevent blood clots together with high-dose vitamin A should consult with health-care professionals.
2
VITAMIN B1 (THIAMINE)
Thiamine was the first B vitamin discovered; therefore, it was named vitamin B1. Vitamin B1 deficiency leads to beriberi disease. In 2600 BCE, ancient Chinese writings recorded the prevalence of beriberi disease in China. Dutch physicians in the 19th century noted that chickens fed only polished rice developed paralysis. Certain important nutrients seemed to be missing from polished rice. In the early 20th century, Casimir Funk isolated a water-soluble antineuritic substance from bran, the hard outer layer of cereal grain, and demonstrated that it could treat beriberi disease. He named the antineuritic substance vitamine.
Vita in Latin means life,
so a vitamine
is required for life and was originally thought to be an amine.
Vitamin B1 obtained from foods is stored mostly in bones and muscles and the brain, heart, liver, kidneys, and other organs. Vitamin B1 participates in the conversion of carbohydrates and lipids into energy, and it is required for the synthesis of thiamine pyrophosphate, or TPP, a cofactor that is essential for a multitude of enzymes involved in energy production in the cell. Without TPP, the body would be unable to produce energy, leading to paralysis.
Which Diseases Are Associated with Vitamin B1 Deficiency?
Vitamin B1 deficiency can cause beriberi disease and Wernicke-Korsakoff syndrome. In addition, TPP deficiency may lead to neurodegenerative diseases as well as hereditary metabolic malfunction.
• Beriberi disease. The two major types of beriberi are wet beriberi and dry beriberi. Wet beriberi affects heart and blood circulation, while dry beriberi damages the nervous system. In extreme cases, it can cause paralysis. Symptoms of beriberi also include dementia, waddling, and foot edema.
• Wernicke-Korsakoff syndrome. Vitamin B1 deficiency can exacerbate Wernicke-Korsakoff syndrome, an alcohol-induced nerve-damaging disease. Symptoms include memory loss, jerky eyeball movements, disorientation, and a staggering gait. Alcohol abstinence may reverse the course of the disease. Untreated, it can lead to psychosis and even death.
What Are the Causes of Vitamin B1 Deficiency?
• Major causes of vitamin B1 deficiency are insufficient intake from foods, malabsorption, transport malfunction, increased demand, or excessive loss. Diseases and conditions that elevate the risk of vitamin B1 deficiency include alcoholism, AIDS, digestive tract disease, liver disease, and severe vomiting. People who are on hunger strike or suffer from anorexia are prone to vitamin B1 deficiency.
Prevention and Treatment of Diseases
• Treatment. Meta-analysis confirms that vitamin B1 can treat heart failure (74). Vitamin B1 may also be effective in Alzheimer’s disease (37), glaucoma (69), and cataracts (49).
• Prevention. Vitamin B1 may prevent cataracts (49) and type 2 diabetes (60).
Which Food Items Are Vitamin B1 Rich?
Vitamin B1–rich foods include beef, nuts, milk, oats, oranges, pork, eggs, and legumes. Vitamin B1–fortified foods include rice, spaghetti, breakfast cereals, bread, and flour. The recommended dietary allowance of vitamin B1 is only 1.5 mg, an amount readily obtainable from foods. However, vitamin B1 is water soluble; therefore, it cannot be stored in the body and needs to be replenished daily via food.
This list of vitamin B1–rich food items is adapted from information provided by the USDA.
Daily reference value of vitamin B1 is 1.5 mg according to the 2013 FDA food-labeling guidelines.
What Are the Recommended Dietary Allowances for Vitamin B1?
There is currently no upper intake limit for vitamin B1.
Vitamin B1 Supplements
• Dosage. The most common dosage for vitamin B1 supplements is 100 mg. Vitamin B1 is relatively safe, and so far, there is no known toxicity.
• Types. Vitamin B1 supplements are made of benfotiamine, thiamine hydrochloride, and thiamine mononitrate. Among them, benfotiamine has the best absorption rate in the intestines.
• Diabetes. Randomized controlled trials have shown that benfotiamine was effective in mitigating symptoms and complications associated with both type 1 and type 2 diabetes, such as peripheral neuropathy and pain. The suggested daily dose of benfotiamine is 200 mg (50 mg four times per day) for three months.
• Heart failure. Vitamin B1 can treat heart failure (74). The recommended daily dose is 100 mg.
• Stress. Vitamin B1 is also known as the antistress vitamin.
It boosts immune functions and regulates mood, thus increasing resistance to stressful conditions.
What Types of Drugs May Interact with Vitamin B1?
• Digoxin. Digoxin is a drug commonly prescribed to treat heart disease. Digoxin may interfere with the absorption of vitamin B1 by cardiac cells.
• Diuretics. Diuretics reduce the blood level of vitamin B1, thus increasing the risk of vitamin B1 deficiency. People who take diuretic medications to reduce the amount of water in the body should consider taking vitamin B1 supplements at a daily dose of 100 mg.
• Antibiotics. Antibiotics hinder the absorption of vitamin B1 by the intestines, thus reducing the blood level of vitamin B1.
3
VITAMIN B2 (RIBOFLAVIN)
Vitamin B2 is also called riboflavin. Its discovery has a colorful history. In the late 19th century, scientists discovered a bright-yellow fluorescent substance in milk. At that time, no one knew anything about this fluorescent substance. In 1930, Otto Warburg and his associates isolated the same substance in yeasts. They showed that it could repair damaged cells. In later years, Warburg’s group confirmed that the bright-yellow substance was riboflavin. Since it was the second vitamin B discovered, it was called vitamin B2.
Riboflavin by itself has no biological activity. It is involved in the synthesis of two important cofactors, FMN (flavin mononucleotide) and FAD (flavin adenine dinucleotide), which support the activities of many enzymes in the body. These enzymes participate in energy production, drug metabolism, and toxin degradation. FAD is also involved in the antioxidant enzymatic reaction that gets rid of free radicals, preventing them from causing cellular and DNA damage. Glutathione is often thought of as the mother of all antioxidants in the body. Glutathione deficiency is common in many chronic diseases, including Alzheimer’s disease, heart disease, stroke, cancer, and diabetes. FAD boosts glutathione levels and enhances the body’s antioxidant capacity. It is also required as a cofactor for the synthesis of new red blood cells. Riboflavin insufficiency can hamper iron absorption and cause anemia.
What Are the Symptoms of Vitamin B2 Deficiency?
• The major symptoms of vitamin B2 deficiency include throat pain, fatigue, skin inflammation and peeling, swollen and inflamed lips, new blood vessels growing in the corneas, anemia, endocrine malfunction, and neurodegeneration.
What Are the Causes of Vitamin B2 Deficiency?
• Diseases. People with congestive heart disease and alcoholism are at high risk of vitamin B2 deficiency. Conversion of riboflavin to cofactors FMN and FAD is blocked in patients with hypothyroid disease and adrenalin insufficiency.
• Insufficient intake from foods. Milk, eggs, and meat are the major food sources of vitamin B2. Researchers in Poland revealed that among people aged 20–25, about 33.7% of women and 25% of men were vitamin B2 deficient due to insufficient intake of vitamin B2 from foods.
Prevention and Treatment of Diseases
• Prevention. Vitamin B2 may prevent cataracts (49), cardiovascular disease (48), lung cancer (82), breast cancer (47), and colon cancer.
• Treatment. Vitamin B2 may help treat migraines (88), hypertension (78), and corneal disorders.
Which Food Items Are Vitamin B2 Rich?
Milk and dairy products are excellent sources of vitamin B2. Animals’ internal organs (e.g., liver, kidneys, heart) as well as plant-based foods—such as nuts, legumes, and dark-green leafy vegetables—are good sources of vitamin B2. Vitamin B2–fortified foods include bread, spaghetti, and breakfast cereal.
This list of vitamin B2–rich food items is adapted from information provided by the USDA.
Daily reference value of vitamin B2 is 1.7 mg according to the 2013 FDA food-labeling guidelines.
What Are the Recommended Dietary Allowances for Vitamin B2?
There is currently no known toxicity of vitamin B2 and no upper intake limit for vitamin B2.
Vitamin B2 Supplements
• Dosage. The most common dosages of vitamin B2 supplements are 50–100 mg, which is much higher than the recommended dietary allowance of 1.2 mg. Nevertheless, vitamin B2 is relatively safe, even when taken at high doses. Various B vitamins seem to act in synchrony and exert complementary effects in the body. If you are a vegetarian and need to take vitamin B2, you may consider taking a vitamin B complex supplement. Vitamin B is bright-yellowish in color, so you should expect your urine to turn bright yellowish when taking a vitamin B2 supplement.
• Hypertension. The MTHFR gene encodes methylenetetrahydrofolate reductase, an enzyme that is critical for folate metabolism, and vitamin B2 is required as its cofactor. Globally, about 10% of people have MTHFR gene polymorphic variants, while 20% of the people in northern China and 32% of all Mexicans carry variants of this gene. Certain MTHFR gene variants cause congenital hypertension, a condition that cannot be controlled by antihypertensive drugs alone. Clinical studies have shown that a combination therapy consisting of antihypertensive drugs and vitamin B2 lowered systolic pressure by 9.2 mmHg and diastolic pressure by 6.0 mmHg in patients with congenital hypertension. The suggested vitamin B2 dose is 1.6 mg daily for 16 months.
• Migraine. Vitamin B2 may mitigate symptoms during a migraine attack. Randomized controlled trials have shown that taking vitamin B2 reduced the incidence of migraine attacks and pain by 50%. In this case, the suggested vitamin B2 dosage is 400 mg daily for three months.
What Types of Drugs May Interact with Vitamin B2?
• Anticonvulsant drugs that prevent seizures and Adriamycin (doxorubicin), used to treat breast cancer, reduce the blood level of vitamin B2.
4
VITAMIN B3 (NIACIN)
Vitamin B3 is also known as niacin. Vitamin B3 deficiency can cause pellagra, which comes from the Italian word for rough skin.
In the late 15th century, Christopher Columbus and his fleets reached South America. Among other things, he brought corn seeds back to Europe. Corn became the main food in Spain, Italy, Egypt, and many other Southern European countries in subsequent centuries. Corn contains niacin, but it is tightly bound to its fibers. Cooking corn in boiled water does not release niacin from the fibers. For thousands of years, American Indians living in South America had developed ways to prepare corn by soaking and cooking it in alkaline lime water. At that time, they had no way of knowing that cooking corn in alkaline lime water released niacin from the corn fibers. Because Columbus brought back corn but not the native Indians’ recipes, the consumption of niacin-poor corn caused vitamin B3 deficiency and thus a pellagra epidemic in southern Europe. Up until the 19th century, many Southern Europeans suffered from pellagra. In 1937, scientists discovered that niacin was effective in treating pellagra and called it vitamin B3.
Niacin is involved in the synthesis of NAD and NADP coenzymes. These two coenzymes are essential for enzymatic reactions that convert proteins, lipids, and carbohydrates to energy in the cell. Without NAD and NADP, the body will not be able to produce the energy needed for maintaining the brain, heart, and muscles, as well as other bodily functions.
What Are the Symptoms of Vitamin B3 Deficiency?
• Pellagra. The major symptoms of pellagra are dermatitis, dementia, and diarrhea. Severe diarrhea exacerbates deficiencies in niacin and other nutrients. Pellagra patients with dermatitis generally avoid sun exposure and thus are inclined to stay indoors. Niacin deficiency–induced dementia was often misdiagnosed as psychosis. During the 17th–19th centuries, many pellagra patients in Europe were confined to madhouses. There, these patients continued consuming niacin-poor corn, further aggravating pellagra.
• Tryptophan. Tryptophan can be converted into vitamin B3 in the body. Tryptophan is a common amino acid found in all protein-rich foods. Many animal-based foods and plant-based foods not only are rich in vitamin B3 but also contain tryptophan. Nowadays, instances of vitamin B3 deficiency are rare.
Prevention and Treatment of Diseases
• Prevention. Vitamin B3 may alleviate osteoarthritis.
• Treatment. Vitamin B3 may decrease LDL and triglycerides and increase HDL.
Which Food Items Are Vitamin B3 Rich?
A variety of foods contain vitamin B3, including nuts, brown rice, whole wheat, oats, and legumes. Meat, milk, and