The Everything Guide to Gut Health: Boost Your Immune System, Eliminate Disease, and Restore Digestive Health
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About this ebook
If you're struggling with digestive disorders, relief is in sight! Scientists have discovered that many common ailments can be linked to an unhealthy gut. And poor gut health causes more problems than IBS and heartburn alone--it's also responsible for weight gain, skin conditions, and depression, too. But you can take simple steps to restore healthy gut flora, which can reduce or eliminate symptoms of a wide range of diseases, including diabetes, arthritis, and chronic fatigue syndrome.
This all-inclusive and natural guide to gut health also features 150 nutritious recipes to promote healthy gut flora, including:
- Fluffy Coconut Pancakes
- Garlicky Veggie-Packed Omelet
- Old-Fashioned Sweet Potato Hash Browns
- Romaine and Avocado Salad
- Roast Lemon Chicken
- Butternut Squash Chowder
- Pork Loin with Baked Apples
- Scallops with Chives
- Thai Vegetable Curry
- Apple Pie Smoothie
- Walnut Pecan Brownies with Raspberry Sauce
- Banana-Coconut Bread
Lindsay Boyers
Lindsay Boyers is a holistic nutritionist specializing in the keto diet, gut health, mood disorders, and functional nutrition. Lindsay earned a degree in food and nutrition from Framingham State University, and she holds a certificate in holistic nutrition consulting from the American College of Healthcare Sciences. She has written twelve books and has had more than 2,000 articles published across various websites, including MindBodyGreen, Healthline, Livestrong, The Spruce, and VeryWell. Lindsay truly believes that you can transform your life through food, a proper mindset, and shared experiences and that’s what she aims to convey to her readers.
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The Everything Guide to Gut Health - Lindsay Boyers
Introduction
YOUR GUT IS ITS own complex ecosystem. It’s home to 100 trillion—yes, trillion—microorganisms, including about 400 different species of bacteria. The bacterial cells in your body actually outnumber the human cells. It may be unsettling to know that you’re carrying around so many bugs, but they are absolutely essential to your health and your life.
Researchers have discovered that the microorganisms in the gut play crucial roles in digestion, metabolism, and immunity. Without microbes in your gut, your body couldn’t break down the food you eat or use the energy it creates for body processes. Your gut is responsible for more than 75 percent of your immune system. The intestinal flora in your gut communicate with the rest of your immune system to alert your body to the presence of a potentially harmful invader.
The gut has also been nicknamed the second brain
because it controls—at least in part—your mental state. Your gut contains 100 million neurons that respond to environmental threats, potential danger, and excitement. That’s why you feel butterflies in your stomach when you’re nervous or your stomach drops when you’re scared. This intricate set of nerves is responsible for your gut instincts
and subconsciously tells you how to react to environmental stimuli. Because it plays a role in so many areas of your body, a healthy gut is absolutely critical to your well-being.
If your gut is in disarray and the bacterial environment is out of balance, you’re going to feel it. If you’re not eliminating properly, you’re going to feel it. Although digestive symptoms like bloating, gas, constipation, heartburn, diarrhea, and irritable bowel syndrome are common indicators of a damaged gut, they are only the beginning. A damaged gut is also connected to autoimmune diseases like thyroid disease, diabetes, multiple sclerosis, and lupus. Damage in your gut may be responsible for hives, skin rashes, eczema, acne, bad breath, joint pain, and muscle pain. An imbalanced gut leads to chronic fatigue and low energy levels. The list really goes on and on and on.
Unfortunately, today’s modern lifestyle is toxic to your gut health. Processed foods, refined sugar, chronic stress, use of medications, and a fast-paced lifestyle have become the norm, and these are all things that can destroy your gut. Regular exposure to chemicals and toxins kills off the good bacteria in your gut and gives the bad bacteria a chance to thrive. When bad bacteria take over, your gut goes into a state of dysbiosis—or bacterial imbalance. Although you may not feel anything at first, eventually this dysbiosis can lead to uncomfortable symptoms and chronic health problems.
Fortunately, changing the way you eat and the way you live can help restore gut health and put you on the path to being the best you that you can be. If you’re experiencing any chronic symptoms or health problems or you just don’t feel right, then it’s time to take a look at the health of your gut. It’s never too late to change your life and start on the path to restoring your gut health.
CHAPTER 1
Assessing Your Gut Health
When it comes to overall wellness, maintaining your gut health is just as important as maintaining your heart health, bone health, and the health of the rest of your body. Although digestive symptoms like heartburn, gas, constipation, diarrhea, nausea, and abdominal pain are common with an unbalanced gut, they are not the only warning signs. An unhealthy gut can also present as food intolerances, skin rashes, arthritis, headaches, and chronic fatigue. Learn what normal digestive health looks like and why you shouldn’t ignore those gut feelings.
How the Digestive System Works
The food you eat is not in a form that your body can use as nourishment. It must be broken down into smaller molecules before it can be absorbed into your blood and carried to cells throughout your body. Digestion allows your body to get the nutrients and energy it needs from the food you eat. The process of digestion begins the moment you even start thinking about food.
When you see, smell, taste, or think about food, your brain sends impulses through the nerves to the salivary glands, signaling them to prepare for a meal. Your salivary glands, which are located under your lower jaw and tongue, respond by producing saliva, which helps break down food.
Parts of the Digestive System
The digestive system consists of the gastrointestinal (digestive) tract and other organs, called accessory organs, which assist in the digestion process. The digestive tract, which runs from your mouth to your anus, consists of all of the hollow organs through which food enters and then leaves your body. As food moves through the digestive tract, nutrients are extracted along the way.
Your nervous system also plays a big role in processing the food you eat. Two types of nerves, called extrinsic and intrinsic nerves, control the digestive system. Extrinsic, or outside, nerves connect to the central nervous system, which consists of the brain and spinal cord. These nerves release chemicals that tell the muscles of the digestive system to either contract or relax, depending on whether or not there is food that needs to be digested.
The intrinsic nerves are those that are inside the gastrointestinal tract. These nerves release substances that control the movement of food through the digestive tract and the production of digestive juices. The intrinsic nerves jump into action when the presence of food literally stretches the walls of the hollow organs like the stomach.
Munching Away
When you see or smell your favorite meal, your salivary glands begin to produce saliva, which contains enzymes that start to break the food into smaller components, and mucus and water, which help soften the food so that you can swallow it. When the food, now referred to as a bolus, is adequately broken down, your tongue helps move it to the back of your throat. At first, swallowing is a conscious decision, but once the swallow begins, the digestion process becomes involuntary and moves along under the control of your nerves. The esophagus, which is about 10" long, moves food from the back of your throat to your stomach.
You have a total of six salivary glands in your mouth. Approximately 99 percent of saliva is water. The rest is a mixture of enzymes and buffers that help break down your food and keep the pH in your mouth neutralized.
Muscles in the walls of the esophagus move in a wavelike motion, called peristalsis, to slowly squeeze the food along its length and down into the stomach. A muscular ring called the lower esophageal sphincter, or LES, allows food to enter the stomach and then squeezes shut to keep food or fluid from flowing back up into the esophagus. If the LES isn’t working properly, stomach contents like partially digested food and stomach acid can flow backward—or reflux—into the esophagus. This is what causes acid reflux and the uncomfortable symptoms that go with it.
The Stomach’s Job
The bolus travels down your esophagus until it reaches your stomach. In the stomach, the bolus comes into contact with various digestive enzymes and hydrochloric acid. The stomach muscles begin to contract and relax to mix the digestive juices with the partially digested food until it’s broken down into a semi-liquid state, now referred to as chyme. The chyme makes its way through your stomach and into your small intestine, approximately 1 teaspoon at a time. An adult’s stomach has a volume of just 2.5 fluid ounces when it is empty, but it can expand to hold 50 times that, or more than 100 fluid ounces, after a large meal. In someone with a healthy gut and digestive system, the total emptying of the stomach takes about 4–5 hours; however, the exact time it takes for the stomach to empty depends on the type of food being digested, the amount of fluid in it, and the health state of the gut. The more fluid present, the faster the stomach empties.
The Small Intestine
The small intestine, which is the longest part of your digestive system, does the bulk of the digestive work. Here, digestive juices from accessory organs like the liver, pancreas, and gallbladder help break down the chyme into absorbable nutrients.
The nutrients your body needs pass through the walls of your small intestine, eventually reaching the bloodstream and traveling to various cells in your body. Food matter that your body doesn’t need or can’t use stays inside the small intestine, where it will travel to the large intestine and eventually leave your body as waste.
Getting Rid of Waste
The undigested material from the small intestine travels to the large intestine, the body’s waste-processing plant. The walls of the large intestine are smooth on the inside and house large colonies of bacteria. The bacteria act on the undigested waste and convert it into gases, acids, and vitamins. The large intestine is also responsible for absorbing excess water. The three parts of the large intestine are the cecum, the colon, and the rectum, each of which plays different roles.
The large intestine is home to the appendix, a small fingerlike pouch located near where the large and small intestine meet. It can become inflamed and extremely painful. Some scientists suggest that the appendix, once thought to be worthless, may actually produce and protect good germs in your body.
The cecum is a pouch at the beginning of the large intestine that joins the small intestine to the large intestine. This transition area expands in diameter, allowing food to travel from the small intestine to the large.
The colon connects to the rectum. It absorbs fluids and salts, and holds the resulting waste. Billions of bacteria live in the colon and help to ferment and absorb substances like fiber. If there is an imbalance in these microorganisms, it can lead to uncomfortable digestive symptoms, like gas and bloating.
The rectum is the last 12" of bowel above the anus. The rectum acts as a storage area for your feces until your next bowel movement. The anus is held closed by a ring of muscles. When you have to go to the bathroom, you relax those muscles to expel feces.
Your small intestine, which is made up of three parts, is about 20' long. Your large intestine is approximately 5' long. Although transit time varies depending on the status of your gut health and the type of food you ate, it generally takes 40–50 hours for food to travel through the entire digestive system.
The Importance of Healthy Digestion and Good Gut Health
Your body uses nutrients like vitamins, minerals, carbohydrates, protein, and fatty acids to carry out every single one of its physiological processes, such as fixing damaged cells and making new ones. Nutrients give cells what they need to work, grow, and divide. The only way to get most of the nutrients your body needs is through the foods you eat.
When your gut is healthy and your digestion is working properly, your body has access to everything it needs to keep itself healthy. When your gut is imbalanced and your digestion is out of whack, your body cannot absorb nutrients no matter how clean your diet is. Adopting a clean diet is only one aspect of gut health. You must also work to fix your damaged gut so you can absorb nutrients by taking the proper supplements, engaging in stress-reduction techniques, and staying properly hydrated.
What is the difference between essential and nonessential nutrients?
Essential nutrients are those that your body cannot make; therefore, you must obtain them through your diet. Nonessential nutrients are those that your body can manufacture from other chemicals and substances in your body, so it’s not as vital to consume them every day, although they are just as important. Examples of nonessential nutrients include the amino acids alanine, glutamine, and arginine.
Identifying Digestive Problems
When your digestive system is working properly, you shouldn’t feel any uncomfortable symptoms like bloating or belching. When the digestive system is out of balance, you may feel severe and persistent symptoms. Signs of digestive distress may include:
Bloating, belching, burning, and flatulence after meals
A sense of extreme fullness after eating
Indigestion, diarrhea, or constipation
Rectal itching
Weak or cracked fingernails
Dilated capillaries in the cheeks and nose
Postadolescent acne or other skin irritations, such as rosacea, eczema, and chronic urticaria (hives)
Iron deficiency
Chronic intestinal infections, parasites, yeast, and unfriendly bacteria
Greasy stools
Easily bruised skin
Fatigue
Figure Out Your Normal
Constipation is clinically defined as having fewer than three bowel movements per week or passing stools that are hard, dry, small, and difficult to pass; but when it comes to regularity, everyone’s different. Some people have several bowel movements daily, often after each meal; others move their bowels only once per day. Your definition of constipation really depends on you and how you feel. The goal is to move your bowels at least once per day and be symptom-free—meaning no pain, abdominal discomfort, bloating, constipation sensation, or heartburn following or between meals.
Constipation affects approximately 42 million people in the United States, making it one of the most common gastrointestinal problems, according to the National Digestive Diseases Information Clearinghouse. People of any race, age, or gender can become constipated, but the condition is most common in women and adults ages 65 and older.
Signs of a poorly functioning colon include:
Straining to pass your bowel contents
Having a hard stool that quickly sinks to the bottom of the toilet
Chronic diarrhea, loose stool, or constipation
Excess gas, bloating, and abdominal cramping
Look Before You Flush
Your stool can give you clues about your overall digestive health, so peek into the toilet bowl before you flush. Healthy stool is smooth, soft, and medium to light brown in color. Your stool should come out in one piece with an ideal diameter of 1–2". Healthy stool also sinks slowly into the toilet bowl, instead of splashing noisily into the water, and doesn’t have a foul odor. If your stools are hard, difficult to pass, and come out in pieces, it may be a sign of digestive trouble. Loose stools are also indicative that there’s a problem with your digestion. Your stool should not float, have a repulsive odor, or contain bits of undigested food. Yellow stool may indicate a gallbladder problem, while white or pale gray stools suggest a lack of bile. Black or bright red stools indicate bleeding in the gastrointestinal tract.
Unless you have been chowing down on beets, the proper response to any deep red or black stools is an immediate check-in with your healthcare provider. If you have regular yellow, white, or pale gray stools, you should also make a trip to your doctor. Red or black stools can signal internal bleeding, while unusual-colored stool can indicate a serious problem with the liver or gallbladder.
Risk Factors for Digestive Problems
A number of factors affect how well your digestive system functions. Your lifestyle, including diet, exercise, smoking, and alcohol consumption, is one of the key indicators. Chronic stress also takes a toll on your digestion. For some people, chronic stress slows things down significantly. Others can’t leave the bathroom during particularly stressful times. Medical history, family history, and genetics also play a role.
Just because you have one or more risk factors for digestive problems doesn’t mean you will definitely develop poor digestive health. Knowing your risk factors can guide you into making the best choices for yourself, whether that means making lifestyle changes or simply being alert for any symptoms that may indicate trouble.
Journaling Foods and Symptoms
If you have digestive troubles or any symptoms that might be related to gut health, a food journal can be your best friend. Keeping track of what you eat and how your body reacts can help you identify troublesome foods or situations and allow you to take control of your digestive health.
Even people with no digestive problems can benefit from keeping a food diary for 2–3 weeks. You may be able to identify unhealthy eating patterns, such as taking in too much sugar, frequently skipping meals, or not eating enough vegetables.
You can track your food intake the old-fashioned way—with a pen and a notebook—or you can turn to technology for an easier way to do the tracking. Many online resources offer food tracking as well as free, downloadable apps that you can carry around with you right on your cell phone.
An honest look at what you eat—and how often you eat—can be a helpful resource in choosing how to improve your diet and, as a result, your health. You may not realize that some of the foods you’re eating are having a negative effect on your body until you see it on paper. Some of the foods that bother you may not bother another. For example, you may find that gluten triggers uncomfortable symptoms, while your brother, mother, or friend may have issues with dairy.
Track Food/Beverage Intake
Here are some key things to look at when tracking your intake:
What kind: Track what you eat and be as specific as you can. Include the main foods from your meals as well as any beverages and condiments, like salad dressings, sour cream, and ketchup. Make a note of how the food was prepared. Did you bake your chicken or fry it? You may find that you can tolerate certain foods better when they are prepared a certain way.
How much: Record the amount of food you eat. For example, list the number of items of food—say 12 pretzels—or the volume of a particular food—say ³⁄4 cup of bran cereal. You may notice that you feel okay with a small amount of a particular food item, but larger amounts cause digestive distress.
Time: Note the time of day you eat or drink. Also record what time you woke up and what time you went to bed that day so you can keep track of how many hours pass between meals. You may notice that you have more energy if you eat