Ten Worst Foods for IBS & Best Foods to Eat
October 30, 2026
IBS is a chronic disorder that causes daily discomfort and pain for nearly 10% of American adults. Irritable Bowel Syndrome is a common disorder in the stomach and intestines (gastrointestinal tract) that can cause cramping, abdominal pain, bloating, gas, diarrhea, and constipation.
Fortunately, IBS’s uncomfortable symptoms can be manageable by maintaining a diet of non-triggering foods. Some foods can cause symptoms to become even more severe, but some foods promote digestion and bring relief. In this blog, we’ll cover the most common foods you should avoid and foods you should eat for IBS.
The most common advice those with IBS may receive is to avoid gluten and add foods with more fiber. However, every individual is unique and may react differently to certain foods. We recommend using these tips as a starting point and working closely with your doctor to determine your specific needs
The Worst Foods & Drinks to Eat For IBS: Processed Foods and More
Dairy, fried foods, caffeine, and alcohol are four types of foods that generally tend to trigger severe symptoms of IBS. Those with Irritable Bowel Syndrome should try to avoid these foods or only consume them in small amounts.
A dietician or nutritionist can help you decide whether to remove these from your diet to promote healthy digestion and comfort.
Diary Products
Cream, cheese, milk, butter, and other dairy products contain lactose, a type of sugar found in cow’s milk. Unfortunately, that means that ice cream and pizza may not be your friends. Excess lactose can be difficult to digest and often causes gas, bloating, and diarrhea for those with IBS.
Luckily, dairy-free options have become more readily available and affordable, even for your favorites—ice cream and pizza. There’s a dairy-free alternative for nearly any food that traditionally contains cow’s milk. Using olive oil instead of butter and switching to oat or almond milk can halt the negative consequences for your IBS.
Fried Foods
Everyone knows that deep-fried foods aren’t the healthiest options on the menu, but did you know they can also trigger nasty IBS symptoms? Crispy fried foods are usually cooked in excess unhealthy oils, and foods that contain high amounts of fats and sugars are difficult to digest. These options may even move through the body without digestion.
Caffeine
Caffeinated beverages like coffee, energy drinks, and soda can cause IBS flare-ups. They are especially likely to cause diarrhea and other symptoms on an empty stomach. Caffeine is considered an irritant because it stimulates the frequency of contractions in your colon.
For those that depend on caffeine for a daily energy boost, try exercising first thing in the morning or going to bed earlier at night. Or, opt for less caffeinated beverages like green and white tea.
Alcohol
Alcohol can be problematic for Irritable Bowel Syndrome for multiple reasons. Alcohol is, first and foremost, a toxin that can cause harm to the digestive system when drinking in excess. Beyond that, many alcoholic beverages contain high amounts of sugar, and certain beer contains gluten, both of which are known to worsen symptoms.
Excess drinking also leads to dehydration which can cause symptoms such as constipation to worsen. If those with IBS choose to drink alcoholic beverages, we recommend sticking to sugar-free and gluten-free options.
The Best Foods & Drinks to Eat For IBS
The following foods promote good digestion and may reduce IBS symptoms. Talk to your doctor or nutritionist to decide which foods should be essential to your diet if you suffer from IBS.
Probiotics
Probiotics are often used to help keep gut bacteria in balance. These beneficial bacteria improve digestion and bowel movements. Probiotics are often found in fermented foods such as kimchi, tempeh, kombucha, miso, and Greek yogurt. The American Gastroenterological Association does not recommend probiotics for children or adults with IBS because study designs have differed.
Whole Grains
While gluten is generally a food that those with IBS should avoid, whole grains are high in fiber and aid in food movement through the digestive tract. Additionally, whole grains lower cholesterol and blood pressure. Rice and oats are good examples of whole grains that may bring relief to those with IBS. However, during a low FODMAP approach, many people temporarily limit wheat and foods made with it, such as bread, pasta, and cereal.
Lean Meats & Fatty Fish
Lean meats and fatty fish are healthy meat options for those with Irritable Bowel syndrome. Fatty fish contain high amounts of omega-3 fatty acids, which are good for heart health and reduce inflammation. Examples of fatty fish are tuna, salmon, mackerel, trout, black cod, and white fish.
Lean meats are high in protein, making them easier to digest, and won’t cause gas. Those with IBS should avoid meats like sausage, bacon, pepperoni, and salami. We recommend adding healthy lean meats like white meat chicken, turkey, sirloin cut steak, veal, and duck to your diet.
Soluble Fiber
Fiber is great for digestion in healthy amounts, and nutritionists may even recommend those with IBS take a Fiber supplement. There are two types of fiber: soluble and insoluble. Soluble fibers found in foods like avocado, oranges, tofu, and sweet potatoes may ease symptoms of IBS.
FAQs:
What foods can trigger IBS symptoms?
Foods that may trigger irritable bowel syndrome (IBS) symptoms include high-fat meals, apples, pears, beans, lentils, products containing high fructose corn syrup, and cruciferous vegetables such as broccoli and Brussels sprouts, which can be healthy yet still aggravate symptoms for some people. Sugar-free gums containing artificial sweeteners such as sorbitol and carbonated beverages can also contribute to diarrhea, bloating, and gas. Highly refined processed foods may also worsen symptoms for some people. Triggers vary from person to person, so keeping a food diary can help identify which foods worsen symptoms.
What is the low FODMAP diet, and how does it help IBS?
The low FODMAP diet reduces high FODMAP foods, the carbohydrates that can be difficult for some people with IBS to digest, and when they are fermented in the colon they can create more gas, bloating, abdominal discomfort, and changes in bowel movements. FODMAP stands for Fermentable Oligosaccharides, Disaccharides, Mono-saccharides, and Polyols. The diet temporarily limits certain fruits, vegetables, dairy products, and other foods before reintroducing low FODMAP foods one at a time over a few weeks to identify individual triggers, ideally with professional guidance. In one report, 76% of IBS patients said their symptoms improved on a low FODMAP diet.
Can lactose intolerance make IBS symptoms worse?
Yes, lactose intolerance can worsen symptoms in people with IBS. Lactose is a sugar found in milk and other dairy products that some people have difficulty digesting. When lactose is not properly absorbed, it can cause gas, bloating, abdominal pain, and diarrhea. Identifying personal food sensitivities can help guide dietary choices and symptom management.
How can I identify foods that trigger IBS symptoms?
Keeping a food diary is a useful way to identify potential IBS triggers. Record your meals, portion sizes, symptoms, and when those symptoms occur. Keep the diary for a few weeks to spot patterns more clearly. Pay attention to foods high in fat, fructose, lactose, and fermentable carbohydrates. A healthcare professional or registered dietitian can review these patterns and determine whether diet changes, including a low FODMAP diet, may be appropriate, which can help prevent IBS flare ups by identifying your personal trigger foods.
What is the best diet for managing IBS symptoms?
There is no single IBS diet that works for everyone. A balanced diet that includes suitable fruits, vegetables, and other nutritious foods, along with drink choices such as lactose free milk that may suit some people better than carbonated beverages or sweet drinks, can support overall gut health. Some people benefit from reducing high-fat meals, limiting specific trigger foods, or following a low FODMAP diet under professional guidance. At ACRIPC, individuals seeking information about digestive health can explore appropriate resources and discuss persistent symptoms with a qualified healthcare professional.
Prioritize Your Colon Health with Alabama Colon & Rectal Institute
Alabama Colon & Rectal Institute specializes in treating colon, rectum, and anus diseases such as IBS. If you’re experiencing symptoms related to Irritable Bowel Syndrome, don’t hesitate to reach out to us about colonoscopies, anorectal surgery, and minimally invasive colon surgery. We proudly provide expertise and care for Colorectal diseases and cancers in the Birmingham area. Call us at 205 850-1830 or contact us online to learn more about our care.