Irritable Bowel Syndrome: Diet and Lifestyle Tips

Dr. Boris Wydoff

Irritable bowel syndrome (IBS) is a functional digestive disorder that causes recurring abdominal pain and cramps, bloating, diarrhea, or constipation. Diet can help manage unpleasant symptoms when you take your individual food tolerances into account. Start with four steps: keep a food and symptom diary, temporarily eliminate foods that regularly cause discomfort, spread approximately 1.5 liters of fluids throughout the day if you have no medical restrictions, and make an appointment with a gastroenterologist if your symptoms keep returning. This approach will help you organize your observations and prepare for a conversation with a specialist.

What Is Irritable Bowel Syndrome and What Are Its Symptoms?

Irritable bowel syndrome is a common functional digestive disorder. People with IBS experience recurring abdominal discomfort accompanied by changes in bowel habits. The condition can persist for a long time, with symptoms varying in intensity from time to time. There may be calm days when your stomach hardly bothers you, followed by flare-ups when even familiar foods cause discomfort.

Which symptoms are most common?

• Abdominal pain and cramps. These often become worse after eating and ease after a bowel movement.
• Bloating. You may feel full, swollen, or as though your abdomen is distended.
• Diarrhea. Stools become loose, and sometimes the urge to go comes on suddenly and requires an immediate trip to the bathroom.
• Constipation. Bowel movements become difficult, you may need to strain, and you may still feel that your bowels have not completely emptied afterward.
• Excessive gas. You may experience rumbling in your abdomen and frequent passing of gas.

Other symptoms can also occur, including nausea, mucus in the stool, fatigue, low energy, back pain, and pelvic pain. Some people experience bladder-related problems, including frequent urges to urinate and a feeling that the bladder has not completely emptied.

You do not have to experience all these symptoms at once. One person may mainly have constipation, another may struggle with diarrhea, while a third may alternate between the two. That is why it is important to consider not only the diagnosis but also your specific symptoms when planning your diet. What you eat when you are prone to constipation may differ from what works best when you frequently have loose stools.

Why Does IBS Develop and What Can Trigger Flare-Ups?

IBS is considered a functional disorder of the digestive system. The severity of symptoms can depend on several factors, including diet, emotional well-being, and your body's individual responses. Known triggers include:

• alcohol;
• caffeine found in coffee, tea, and some other drinks;
• spicy and fatty foods;
• certain foods that a particular person does not tolerate well;
• stress and anxiety;
• regular use of antibiotics.

Sometimes a flare-up begins without any obvious reason. You may eat your usual foods for several days and then suddenly experience bloating, cramps, or changes in bowel habits. That is why keeping a diary is useful rather than trying to explain every setback in how you feel by pointing to one particular meal.

Your emotional state deserves special attention. Anxiety and emotional distress can be accompanied by worsening intestinal symptoms. When looking after your digestion, it is therefore helpful to consider not only what is on your plate but also your daily workload, quality of rest, and stress levels.

In my naturopathic practice, I also pay attention to overall lifestyle. I see digestive health as connected to hydration, eating habits, physical activity, and emotional well-being. This is my approach to improving health, which looks at everyday habits as a whole.

How Can You Tell IBS Apart from Other Digestive Problems?

The main difficulty is that pain, bloating, constipation, and diarrhea are not exclusive to IBS. For example, abdominal pain after eating may be accompanied by changes in bowel movements, while bloating can occur even after familiar meals. These symptoms need to be assessed as part of the overall clinical picture.

How is the diagnosis made? A doctor evaluates your complaints, the nature of your symptoms, and the results of any examinations. If necessary, tests are ordered to rule out other health problems. Medical evaluation is essential to avoid mistaking a condition that requires a different treatment approach for IBS.

Pay attention to how long your symptoms have been present. If typical symptoms persist for more than four weeks, you should see a general practitioner or gastroenterologist. Do not wait until the discomfort becomes so severe that it interferes with your everyday life.

Self-directed dietary experiments should also be accompanied by careful observation. If your stomach stops hurting after you eliminate a particular food, write down the change and note how long the improvement lasts. This information will help your doctor better understand your situation and decide on the next steps.

Irritable Bowel Syndrome: What Can You Eat and What Should You Avoid?

Diet for IBS should be tailored to the individual. There is no universal meal plan that works equally well for everyone with this condition. One person may tolerate vegetables and fruit without any problems, while another may experience significant gas or diarrhea after eating some of them.

Start by keeping a food diary. Write down what you eat and drink, when you have your meals, when discomfort appears, and whether your bowel habits change. Keep your records consistently, including familiar foods. After a while, you may notice that certain meals regularly coincide with periods when you feel worse.

What foods can usually be included in your diet?

A healthy, balanced diet is a good starting point. If you are prone to bloating and cramps, doctors recommend considering oatmeal. It can be a convenient breakfast option, especially if you tolerate oats well.

If you have constipation, foods containing soluble fiber can be helpful. These include oats, legumes, carrots, peeled potatoes, and ground or whole flaxseeds. Introduce these foods gradually and observe how your intestines respond. Increasing your fiber intake too quickly can make gas and discomfort worse, so focus on what you tolerate rather than trying to eat as much fiber as possible.

If diarrhea is your main symptom, the recommendations will be different. In this case, you may need to temporarily reduce foods high in fiber, including whole grains, nuts, and seeds. When you have loose stools, replacing lost fluids is especially important.

Which foods can make you feel worse?

If you experience excessive gas and cramps, it is worth checking how well you tolerate cabbage, broccoli, cauliflower, Brussels sprouts, beans, and onions. These foods can be difficult to digest for some people with IBS. You should also pay attention to the following categories:

• fatty meals;
• spicy foods;
• highly processed foods;
• alcohol;
• carbonated drinks;
• products containing the sweetener sorbitol;
• excessive amounts of coffee and strong tea.

You do not have to eliminate all these foods at once. Choose the ones that most often coincide with a worsening of your symptoms and start by changing those particular eating habits. If you cut out bread, dairy products, fruit, grains, and most vegetables all at once, it will be difficult to tell which change actually helped.

When testing your tolerance, it is useful to proceed step by step: first change one part of your diet, then assess the result and record your observations. After a period of elimination, you can try reintroducing the food and monitor your response. This gradual process will help you build your own list of suitable meals and foods.

How Should You Manage Your Fluid Intake?

With IBS, it is important to remember to drink enough fluids. A guideline often given by doctors is approximately 1.5 liters of fluids a day, provided you have no individual medical restrictions. Plain water and caffeine-free drinks are suitable choices.

It is easier to spread your fluid intake evenly throughout the day rather than drinking most of it all at once. You can start your morning with a glass of water, take small sips between meals, and maintain a regular drinking routine throughout the day. However, there is no need to deliberately drink large amounts immediately before eating if this makes you feel overly full.

If diarrhea is a problem, replacing lost fluids becomes particularly important because of the risk of dehydration. With constipation, water also helps soften stools. Regular hydration should become part of your everyday routine rather than something you do only during a flare-up.

How Can You Organize Your Meals at Home to Reduce Discomfort?

Irritable bowel syndrome requires you to pay attention to your body's individual responses. That is why making dietary changes at home should start with gradual adjustments rather than strict restrictions.

The first rule is to eat regularly.

Do not skip meals, and try to avoid an irregular eating pattern. Long gaps between meals can make symptoms harder to manage. Choose a daily routine that works for you and stick to it, noting in your diary how your intestines respond to regular mealtimes.

The second rule is to take your time when eating.

Eat slowly, chew your food thoroughly, and pay attention to when you feel full. Eating too quickly can involve swallowing air, which contributes to bloating. There is no need to rush or combine mealtimes with constant worries and stressful activities.

The third rule is to make dietary changes gradually.

If you notice a connection between a particular food and unpleasant symptoms, temporarily eliminate it and monitor the results. Do not remove several major food groups at the same time. When you change your diet gradually, it is easier to identify which foods really trigger your symptoms and which ones you can keep in your daily menu.

The fourth rule is to stay physically active.

Regular walks, gentle exercise, and other manageable activities help maintain your overall fitness and can become part of your everyday digestive health routine. Choose activities that do not cause additional discomfort and suit your usual lifestyle.

The fifth rule is to make time for rest.

Stress and anxiety can trigger worsening intestinal symptoms. A peaceful walk, breathing exercises, adequate sleep, and making time to relax can help reduce everyday tension. Do not turn every meal into a test: observe your body's responses calmly and consistently.

If dietary changes and available over-the-counter remedies do not help, your doctor may suggest other options. You may sometimes need advice from a nutrition specialist or gastroenterologist. Do not stop taking prescribed medication on your own.

What Do I Recommend for Irritable Bowel Syndrome?

In more than fifty years of practice, I have become convinced that when dealing with digestive problems, it is important to look not only at individual foods but also at your overall daily diet. Below, I will share a few principles that I describe in my books. This is my naturopathic approach to organizing nutrition and lifestyle.

First. Maintain a regular hydration routine.

In my books, I call water the first pillar of intestinal health. I recommend starting the morning with a glass of warm water, drinking it slowly in small sips, and not replacing plain water with tea or coffee. I associate insufficient fluid intake with difficulty moving food through the digestive tract and irregular bowel movements. In my experience, the habit of drinking water regularly throughout the day helps establish a more consistent routine for eating and looking after your digestion.

Second. Include vegetables, but pay attention to how your intestines respond.

In my recommendations, I describe vegetables as one of the main foundations of natural nutrition. I suggest including both raw and stewed vegetables because I place particular importance on dietary fiber. I also mention ground flaxseeds and soaked prunes as additional foods to include in your diet. With IBS, it is important to monitor your tolerance: some vegetables, prunes, and excessive fiber intake can make bloating or loose stools worse.

Third. Pay attention to food combinations.

In my book *The ABCs of Health*, I describe food combining according to Professor Shelton's system in detail. I suggest combining protein-rich foods with vegetables, eating fruit separately, and not building every meal around sandwiches. I associate this approach with reducing the burden on digestion and fermentation in the intestines. This is my naturopathic concept, not a method of controlling IBS symptoms that has been proven by modern gastroenterology.

Fourth. Do not separate your diet from your emotional well-being.

In my books, I write that anxiety and constantly expecting unpleasant sensations can affect how your intestines feel. I recommend not turning every meal into a test, staying calm, and avoiding fear of particular foods before you even eat them. In my view, your psychological state is an important part of an overall approach to digestion. Modern medicine also recognizes the connection between intestinal function and the nervous system, explaining it through the interaction between the gut and the brain.

If you have chronic symptoms, my approach to diet and lifestyle should be considered a complement to medical care, not a replacement for prescribed treatment.

When to See a Doctor

With irritable bowel syndrome, it is important not to overlook warning signs that may point to a more serious problem. Not every bout of pain or change in bowel habits indicates a dangerous illness, but certain symptoms require prompt medical assessment.

When Do You Need Urgent Medical Attention?

Warning signs that require urgent medical assessment include:

• significant unexplained weight loss;
• bleeding from the rectum or bloody diarrhea;
• finding a hard lump or swelling in your abdomen;
• shortness of breath, noticeable heart palpitations, and unusual paleness of the skin.

You should not automatically attribute these signs to IBS. They may indicate other medical conditions, so do not delay seeking medical attention. If chest pain spreads to your arm and you develop a cold sweat, call emergency services immediately — these may be signs of a heart attack.

When Should You Make a Routine Doctor's Appointment?

If you suspect you have irritable bowel syndrome and your typical symptoms have lasted for more than four weeks, see a general practitioner or gastroenterologist. A specialist will assess your symptoms and, if necessary, arrange tests to rule out other conditions.

You should also arrange another consultation if dietary changes and available pharmacy remedies are not helping you manage your symptoms. See a doctor if you have to give up a large number of foods just to reduce your discomfort. You may need help from a dietitian or additional treatment.

To learn more about how I approach this subject, visit the “Digestive Health” page.

Boris Wydoff — naturopath and author, Ph.D. in nutrition. For over fifty years I have helped people restore health through nutrition, cleansing and the power of the mind — in Europe, America and Asia. About the author →

Read next

All articles by Dr. Boris Wydoff’s method →