8 Signs of a Leaky Gut Experts Want You to Know

Plus, the best way to ease symptoms.

Published on Feb. 22, 2026

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Leaky gut, or gastrointestinal barrier dysfunction, is a condition where the gut lining becomes less effective at acting as a barrier, allowing larger particles like undigested food and bacteria to pass into the bloodstream. This can lead to inflammation and immune issues. Experts say the symptoms of leaky gut are not super specific, but common signs include bloating, gas, constipation, diarrhea, nutritional deficiencies, skin issues, and brain fog. To help heal the gut lining and improve overall gut health, experts recommend eating adequate fiber and whole foods, avoiding processed foods and those high in sugar, and minimizing irritants like smoking, heavy alcohol, spicy foods, and caffeine. Managing stress, prioritizing sleep, and drinking enough water may also help.

Why it matters

Leaky gut may be a key contributor to conditions like celiac disease and inflammatory bowel disease (IBD). It can disturb the balance of good and bad bacteria in the gut, prompting an inflammatory response. Identifying and addressing the signs of leaky gut is important for overall gut and digestive health.

The details

Leaky gut, or gastrointestinal barrier dysfunction, is a hypothetical diagnosis where the gut lining becomes less effective at acting as a barrier. This allows larger particles like undigested food components and bacteria to pass across the intestinal walls into the bloodstream, which can lead to inflammation and immune issues. The symptoms of leaky gut are not super specific, making it hard to identify. However, common signs include bloating, gas, constipation, diarrhea, nutritional deficiencies, skin issues, and brain fog.

  • The article was published on February 18, 2026.

The players

Pratima Dibba, M.D.

A gastroenterologist with Medical Offices of Manhattan.

Amy Davis, R.D., L.D.N.

A registered dietitian based in New Orleans, LA.

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What they’re saying

“'Leaky gut' is not an official medical term. It is a hypothetical diagnosis alluding to intestinal permeability.”

— Pratima Dibba, M.D., Gastroenterologist (prevention.com)

“When this happens, larger particles like undigested food components and bacteria can pass across the intestinal walls into the bloodstream. This is a problem because it can lead to inflammation and immune issues.”

— Amy Davis, R.D., L.D.N., Registered Dietitian (prevention.com)

The takeaway

Identifying and addressing the signs of leaky gut, such as bloating, gas, constipation, diarrhea, nutritional deficiencies, skin issues, and brain fog, is important for overall gut and digestive health. Making dietary and lifestyle changes like eating more fiber and whole foods, avoiding processed and sugary foods, and managing stress can help repair the gut lining and reduce symptoms associated with leaky gut.