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IP describes how easily substances such as food, nutrients, and bacteria can pass through the intestinal wall.
The intestinal wall consists of epithelial cells. Tiny gaps between these cells allow water, ions, and other nutrients to flow from the intestines into the bloodstream. Usually, food and waste particles cannot pass through these gaps.
In leaky gut syndrome, however, inflammation and bacterial imbalances in the gut cause these gaps to expand. This allows harmful substances to leak into the bloodstream.
In fact, a 2016 review article suggests that there is a close relationship between concentrations of intestinal bacteria, inflammation, and IP. Importantly, diet and nutrition may influence these factors.
This article discusses leaky gut syndrome and the foods that may affect it. We also provide a brief meal plan that incorporates foods to eat for improved digestive health.
Foods to eat
Fermented foods, such as kimchi, can increase the diversity of bacteria in the gut.
According to a 2018 review, having a low biodiversity of gut bacteria may lead to increased IP and inflammation.
So, people may benefit from adopting a diet that increases the diversity of bacteria within the gut. This is likely to involve incorporating more prebiotic and probiotic foods that support the growth of beneficial gut bacteria.
Examples of such foods include:
- probiotic yogurt
- fermented yogurt, or kefir
- other fermented foods, such as kimchi, sauerkraut, and miso
- sourdough bread
- some cheeses
Other foods that may improve gut health include:
- vegetables such as eggplant, broccoli, cabbage, carrots, and zucchini
- fruits including blueberries, grapes, oranges, papaya, and strawberries
- nuts and seeds, such as almonds, peanuts, cashews, and pine nuts
- lactose free dairy products and dairy alternatives, including hard cheese, lactose free milk, and plant based milk alternatives
- grains such as oats, corn, rice, and quinoa
Foods to avoid
People who experience unpleasant gastrointestinal symptoms may want to avoid eating foods that are difficult to digest. Experts refer to these foods as fermentable oligo-, di-, mono-saccharides and polyols (FODMAPs).
FODMAPs are short chain carbohydrates, which bacteria break down, or ferment. This fermentation process results in the production of gas, which causes uncomfortable symptoms such as bloating and flatulence.
Examples of FODMAPs include:
Adopting a low FODMAP diet may reduce gas production. This, in turn, may help alleviate the digestive discomfort that leaky gut syndrome brings.
High FODMAP foods to avoid include:
- fruits such as apples, cherries, peaches, pears, goji berries, dates, and watermelon
- vegetables including asparagus, mushrooms, onions, and garlic
- legumes, such as black beans, fava beans, kidney beans, and chickpeas
- natural and artificial sweeteners, including fructose, honey, xylitol, sorbitol
- grains such as wheat, flour, barley, rye, and almond meal
- beverages including soda, fruit juice, beer, and wine
This section covers a few simple meal ideas for improving gut health.
Some people may find that certain foods trigger symptoms more than others.
People can use a food journal to track their dietary habits and symptoms and identify potential trigger foods.
- Fruit parfait: Top a bowl of Greek yogurt with blueberries, strawberries, or kiwifruit slices.
- Oatmeal: Add water or dairy free milk to rolled oats and top with blueberries.
- Eggs and toast: Add one or two eggs to some sourdough toast.
Lunch and dinner
- Salad: Combine mixed greens with sliced chicken breast, carrots, tomatoes, and shredded parmesan cheese.
- Frittata: To make, use eggs, broccoli, tomatoes, and a protein of choice (optional).
- Stir-fry: Combine beef, broccoli, carrots, bell peppers, and zucchini noodles.
- Lemon chicken: Serve a grilled chicken breast with sweet potatoes and Brussels sprouts.
- Salmon: Grill or pan-sear a salmon fillet and serve it with a side salad.
- rice crackers topped with peanut butter
- grapes and brie
- overnight rolled oats topped with strawberries or dark chocolate nibs
- a mix of almonds, walnuts, and hazelnuts
What does the research say?
Oatmeal is a good breakfast idea for someone with leaky gut syndrome.
Some experts have suggested that the protein zonulin could play an important role in leaky gut. This is because zonulin regulates the size of the gaps between epithelial cells.
Also, a 2018 study found that women with high zonulin levels showed lower concentrations of beneficial gut bacteria than women with low zonulin levels. These beneficial bacteria appear to reduce gut permeability and intestinal inflammation.
Women with low zonulin levels also tended to consume diets higher in calories, carbohydrates, protein, and salt. Although these associations were minor, the researchers suggest that diet may influence gut bacteria, IP, and overall digestive health.
People who think that they may have leaky gut syndrome can try making dietary changes to manage their symptoms.
Not everyone responds in the same way to different foods. People can try keeping a food diary to identify foods that trigger leaky gut symptoms.
People should consider seeing a doctor if their symptoms do not improve despite incorporating the above dietary changes.
What is the difference between prebiotics and probiotics?
Prebiotics and probiotics work together to encourage the growth of beneficial bacteria that can improve digestion and support the immune system. Both prebiotics and probiotics occur naturally in many foods. Here, learn more about the differences between them, their benefits, and how to incorporate them into the diet.
What prebiotic foods should people eat?
Prebiotics work with probiotics in the body to promote the growth of beneficial bacteria in the gut. Many prebiotic foods are suitable for vegans, including almonds, savoy cabbage, garlic, chicory, and leeks. In this article, learn more about the best prebiotic foods for vegans.
Are oats good for you?
Oats have become very popular and are known for their high fiber and healthy cholesterol-lowering properties. There are numerous other reasons why oats are good for you, including their antioxidant, mineral, and vitamin content. Other health benefits include fighting off several diseases. We look at the facts here.
The many health benefits of broccoli
Broccoli is a cruciferous vegetable that is a nutritional powerhouse. It contains lots of nutrients and very few calories. Eating broccoli may have many health benefits, including lowering cancer risk, improving bone health, and helping fight skin damage. The article includes a breakdown of its nutritional contents.
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