3 Best Diets To Follow If You Have IBS- What to Eat And Avoid

Irritable Bowel Syndrome is a gastrointestinal disorder that affects millions of people worldwide. Its symptoms are estimated to affect 10% to 15% of the U.S. population. IBS is characterized by abdominal pain, bloating, and disruptions in bowel movements, either diarrhea, constipation, or both, which can significantly affect daily life.

While IBS is not associated with long-term structural damage to the digestive tract and does not develop into other potentially serious diseases like colon cancer, IBS is considered a chronic illness that may sometimes be treated using diet, lifestyle modifications, or medication. Perhaps the best and most direct means of treating IBS is through changes in diet.

However, due to the variability of IBS, there isn't one type of diet to treat IBS. What works for one person may not work for another. Therefore, an individualized approach is imperative. Below, we dive into the best diets and strategies that can help manage IBS, while also emphasizing the importance of consulting a healthcare provider or dietitian before embarking on any significant dietary changes.

Irritable Bowel Syndrome and the Role of Diet

IBS often is associated with heightened sensitivity of the nerves of the digestive tract, which produces abnormal bowel movements and discomfort. Researchers believe that the way the gut communicates with the brain is thought to be one reason for heightened sensitivities. Many IBS patients find managing their symptoms relies on identifying foods that trigger reactions. Some types of IBS will worsen symptoms, whereas others will decrease discomfort. There are three typical types of IBS:

• IBS with Diarrhea (IBS-D)
• IBS with Constipation (IBS-C)
• IBS with Mixed Symptoms (IBS-M)

Since every two individuals have their unique set of precipitating factors, each type of food is to be identified to someone that exacerbates the symptoms. A diet customized to each form of IBS can assist in reducing the symptoms and enhancing the quality of life.

Important Dietary Interventions for IBS Management

Given the complexity of IBS, most healthcare providers recommend a two-phase approach- increase fiber intake and avoid trigger foods. Here's a breakdown of both strategies and the diets that align with them.

Increase Fiber Intake

Fiber is very influential in digestive health, and its impact in particular is significantly beneficial for an IBS. Fiber helps balance bowel movements while making stools soft and easy to pass, and this is extremely helpful for persons with constipation (IBS-C). As recommended by Dietary Guidelines for Americans, adults have a suggested level of 22 to 34 grams fiber per day.

The consumption of fiber, however, should be increased gradually. Too much fiber at once might exacerbate some of the symptoms, including gas and bloating. Increasing hydration is important because it can help fiber function and alleviate constipation.

There are two types of fiber: soluble and insoluble.

Soluble Fiber: It is water-dissolving and helps to create a gel-like effect to control the movement of bowels. For individuals suffering from IBS, it is quite safe compared to insoluble fiber.

Insoluble Fiber: Found in whole grains and vegetables, it irritates the gut of individuals who are diagnosed with IBS and they develop bloating and gas more severely.

Avoid Trigger Foods

The main aspect of managing IBS is avoiding foods that trigger the symptoms. Some of the common culprits include:

Gluten: This protein is found in wheat, rye, and barley. Gluten irritates the digestive tract in most people, and this irritation worsens in individuals with gluten sensitivity or celiac disease.

Lactose: This sugar found in dairy products causes bloating, cramps, and diarrhea in those with lactose intolerance.

FODMAPs: Fermentable oligosaccharides, disaccharides, monosaccharides, and polyols (FODMAPs) are short-chain carbohydrates that can cause IBS symptoms. They are poorly absorbed in the small intestine and ferment in the colon, producing gas and bloating.

Also Read: Irritable Bowel Syndrome: Switching To High Sugar Diet Can Reduce IBS Symptoms

Best Diets for IBS Relief

Now that we understand the general strategies for managing IBS through diet, let's explore specific diet plans according to the U.S. News & World Report that have been proven effective for many individuals with the condition.

Low FODMAP Diet

The Low FODMAP Diet, which was developed by researchers at Monash University, is one of the most well-researched and effective dietary approaches for IBS. This diet eliminates foods high in FODMAPs, such as certain fruits, vegetables, dairy products, and legumes. By restricting these foods, individuals can reduce bloating, gas, and other symptoms commonly associated with IBS.

What to Eat on a Low FODMAP Diet

• Eggs, poultry, fish, tofu, and tempeh
• Grapes, oranges, and berries
• Spinach, zucchini, carrots, and bell peppers
• Rice, oats, quinoa, and popcorn
• Lactose-free products, including milk and cheese
• Almonds, macadamia nuts, and peanuts

What to Avoid

• High-FODMAP fruits like apples, pears, and watermelon
• Dairy containing lactose
• Legumes, including lentils and chickpeas
• Wheat and rye products

Research proves that the low FODMAP diet brings about relief in 60% to 85% of IBS patients, therefore it is among the most often recommended diets for IBS.

Low-Residue Diet

A Low-Residue Diet is a short-term approach used to reduce fiber intake and avoid foods that contribute to stool bulk. This diet is typically recommended during IBS flare-ups or other gastrointestinal conditions. It focuses on easy-to-digest foods that won't irritate the digestive system.

What to Eat on a Low-Residue Diet

• White bread, pasta, and rice
• Peeled and soft-cooked fruits and vegetables like bananas, cantaloupe, and green beans
• Lean meats such as chicken and fish, eggs, and tofu
• Low-fat products like smooth yogurt and cream cheese

This diet may be helpful to provide temporary relief during flare-ups but is not recommended for a long time as it is restrictive.

Gluten-Free Diet

A Gluten-Free Diet involves the removal of foods that contain gluten, which is a protein found in wheat, barley, and rye. Although typically used to manage celiac disease, this diet may also benefit those with IBS, if gluten is their trigger.

What to Eat on a Gluten-Free Diet

• Fruits and vegetables
• Quinoa, rice, oats, and corn products
• Meat and fish as long as it is unprocessed and gluten-free
• Beans and lentils

A gluten-free diet can also help reduce symptoms of IBS and suspected gluten sensitivity, especially bloating and gas.

More Tips to Manage IBS Through Diet

In addition to the right diet, healthy eating habits can also promote digestive health and alleviate IBS symptoms. These include:

• Eating at the same time each day will keep your digestive system on track.
• Chew your food properly and don't gobble down your food so that there will be no bloating or indigestion.
• Drink fluids during the day for proper digestion and to prevent constipation.
• Caffeine is irritating to the gut and will activate IBS symptoms, so one should have it in moderation or avoid it at all costs.

How to Find the Right Diet for You?

Diet management of IBS is more of a trial-and-error process. What works for one person may not work for another, so it's best to work with a healthcare provider or dietitian who specializes in gastrointestinal health. By identifying trigger foods, increasing fiber intake, and adopting the right diet plan, many individuals can successfully manage their IBS symptoms and lead a healthier, more comfortable life.