Health Benefits of Low-FODMAP Diet

Introduction

The abbreviation FODMAP stands for fermentable oligosaccharides, disaccharides, monosaccharides, and polyols. These are short-chain carbohydrates and sugar alcohols the body does not properly absorb. Not absorbing these substances results in gas, abdominal pain, and bloating. FODMAP can be present in food naturally or can be added. Eating food containing many of these substances can result in gas, stomachache, abdominal distention, and diarrhea.

The main sources of FODMAPs include:

• Oligosaccharides - Onions, garlic, wheat, legumes.

• Disaccharides - Dairy products like yogurt and soft cheese contain lactose.

• Monosaccharides - Fruits like figs and mangoes, honey, and other sweeteners.

• Polyols - Fruits like blackberries and lychee, sugar-free drinks, and gums.

What Is a Low FODMAP Diet?

A low-FODMAP diet should avoid foods high in FODMAPs, such as some vegetables and fruits, lentils, wheat, milk products containing lactose, corn syrup, and sugary beverages. However, it can include lactose-free dairy, soy, oats, brown rice, hard cheese, meat, fish, seeds, chicken, eggs, quinoa, and nuts.

This diet is started by eliminating or restricting foods high in FODMAP for three to eight weeks. After this, a low-FODMAP diet is reintroduced to see if it causes gastric problems. It is a very restrictive diet, so it is not a permanent solution. This diet may help with gastrointestinal (GI) problems like irritable bowel syndrome (IBS) and small intestinal bacterial overgrowth (SIBO).

What Makes FODMAPs Challenging for Digestion?

FODMAPs are hard to digest because they are carbohydrates made of sugar molecules linked together. Since they cannot be broken down into single molecules in the small intestine, they move to the large intestine, drawing in extra water. Bacteria in the large intestine then ferment these FODMAPs, creating gases and fatty acids, leading to digestive discomfort.

What Are the Foods to Be Avoided?

Some of the food items that need to be avoided are:

• Wheat.

• Garlic.

• Onion.

• Fruits like apples, cherries, apricots, pears, mangoes, pears, watermelons, and nectarines.

• Vegetables like asparagus, cauliflower, leeks, mushrooms, Brussels sprouts, and snow peas.

• Legumes and pulses like bread, chickpeas, kidney, and butter beans.

• Sweeteners like corn syrup and honey.

• Rye.

• Soft cheeses like cottage cheese and ricotta.

• Milk.

• Chamomile and chai tea.

What Are the Foods That Can Be Included?

Foods that are low in FODMAP are:

• Brown rice.

• Maize.

• Oats.

• Quinoa.

• Tapioca.

• Chives.

• Ginger.

• Lemongrass.

• Turmeric.

• Asafoetida.

• Fruits like unripe bananas, kiwi, oranges, pineapple, and strawberries.

• Vegetables like capsicum, carrot, eggplant, kale, and spinach.

• Proteins like tofu, eggs, chicken, fish, and seeds.

• Sweeteners like maple syrup, sucrose, and glucose.

• Hard cheeses like cheddar and parmesan.

Does a Low-FODMAP Diet Help IBS?

IBS (irritable bowel syndrome) is a common gastrointestinal disorder that affects the large intestine. This condition is more common in women than in men. IBS causes symptoms like abdominal pain or discomfort, bloating, gas, incomplete bowel movement, an inability to empty bowels, mucus in the stools, constipation or diarrhea, nausea, and indigestion.

Doctors and scientists are still unable to find the exact cause of this disease. IBS patients experience significant relief from symptoms with diet changes. A low-FODMAP diet has also shown promising results in the treatment of IBS.

A clinical trial that compared the effect of this diet in IBS patients found that IBS symptoms improved by up to 50 percent in patients within a week of implementing this diet. It helped with symptoms like abdominal pain, gas, and stool consistency. Another study found that 86 % of IBS patients noticed improvements in their symptoms while on this diet. Many other studies showed similar results.

Can a Low-FODMAP Diet Alleviate Constipation?

Some research suggests that following a low FODMAP diet might ease constipation in individuals with IBS, but the situation is likely more complicated than that. Generally, doctors advise a diet high in fiber to prevent constipation. Fiber helps food move smoothly through the digestive system and promotes fluid absorption into the intestines, which keeps stool soft.

However, avoiding high FODMAP foods without replacing them with suitable alternatives could lead to constipation in individuals with IBS. It is recommended to consult with a dietitian while implementing the diet to ensure the right balance and type of fiber to prevent constipation.

Does a Low-FODMAP Diet Aid in Losing Weight?

While some individuals may lose weight by adopting a low FODMAP diet, experts do not suggest it specifically for weight loss. Weight loss on this diet might happen because of eating fewer calories, which could be risky, especially for those starting with a low weight. If someone wants to lose weight, it is best to talk to their doctor to find a safe approach.

Who Can Benefit from a Low-FODMAP Diet?

A low-FODMAP diet is only advisable for individuals who have been diagnosed with IBS. If an individual does not have IBS, then this diet is not for them, as it might result in harmful side effects. This is true because foods rich in FODMAPS promote the growth of good gut bacteria, which is essential for a healthy digestive system. If one has been diagnosed with IBS, one can try this diet after consulting the treating doctor. It is helpful for IBS patients who have:

• Active abdominal symptoms.

• There was no relief, even after stress management therapies.

• Symptoms even after avoiding foods like alcohol, coffee, and others that trigger symptoms.

There is not enough evidence to support that this diet is helpful for children with IBS.

Does FODMAPs Negatively Affect Everyone?

While not problematic for everyone, some individuals experience difficulties digesting certain foods due to their sensitive digestive systems. These foods can lead to symptoms like gas, bloating, abdominal pain, and changes in bowel habits for these individuals. Despite the human body's ability to partially digest certain foods, like dietary fiber, the fermentation process by gut bacteria can still cause discomfort and affect the overall well-being of sensitive individuals.

How to Start a Low-FODMAP Diet?

A low-FODMAP diet involves the following three stages:

Stage 1 - Restriction:

All food items high in FODMAPs are avoided in this stage for about 3 to 8 weeks. People who follow this diet often think they should avoid all FODMAPs long-term, but this stage should only last about 3 to 8 weeks. Most patients notice changes in symptoms within a week, but for some, it might take longer. If someone feels their symptoms have significantly improved, they can proceed to stage 2.

Stage 2 - Reintroduction:

Here, high-FODMAP foods are reintroduced into the diet to identify the types and amounts of FODMAPs the patient can tolerate. The patient tries specific foods one by one for three days each. Some patients can tolerate certain high-FODMAP foods, but it is important not to overdo it. It is best to consult a dietician, who can guide one properly through this stage.

Stage 3 - Personalization:

Otherwise called a modified low-FODMAP diet, in this stage, the food that one tolerated in stage 2 is taken. The quantity might be limited, but it is important to introduce high-FODMAP foods into the diet.

What Steps Should Be Taken Before Beginning the Low-FODMAP Diet?

1. Before starting the low-FODMAP diet, it's important to consult a reliable healthcare provider, such as a registered dietitian or GI specialist, who can offer guidance and alternative ideas and help navigate the diet's nuances.

2. Planning is also key; set aside dedicated time to complete the diet without conflicting with other obligations. Clearing the kitchen of high-FODMAP foods, preparing menu plans, and ensuring there are ingredients for simple meals will make the process smoother.

What Are the Steps for Following a Low FODMAP Diet?

Cutting out foods high in FODMAPs for a few weeks is usually advised. If FODMAPs are the issue, feeling better within days is possible. After three weeks, slowly bring back some of these foods one by one to see which causes problems. Consulting a doctor or dietitian trained in this area for guidance is wise. Tests can also be performed to see if avoiding specific FODMAPs like fructose or lactose is necessary, preventing unnecessary dietary restrictions.

Conclusion

Numerous studies have demonstrated the positive outcomes of this diet for individuals with IBS. These studies indicate reduced symptoms such as stomach pain, bloating, and gas. Given the debilitating nature of IBS symptoms, a significant proportion of patients experience a life free from these symptoms through adherence to this dietary approach. Moreover, the diet has been found to enhance overall quality of life and boost energy levels in individuals with IBS.

Go for this diet only if all other treatment modalities have failed to give satisfactory results. Always consult a doctor before starting this diet. Only attempt to follow a low-FODMAP diet after consulting a dietician. For more information on this diet, consult a dietician online.