What Causes Excessive Gas and Bloating After Meals?

Excessive gas and bloating after meals typically result from swallowing air while eating or from bacterial fermentation of undigested food in the colon. Common culprits include eating too quickly, consuming carbonated beverages, or chewing gum, which can introduce excess air into your digestive system. Certain foods are particularly problematic, including beans, cruciferous vegetables like broccoli and cabbage, dairy products for lactose-intolerant individuals, and high-fiber foods. Small intestinal bacterial overgrowth (SIBO) can cause bloating and gas in some people, but these symptoms have many possible causes and do not necessarily indicate SIBO. Food intolerances can cause gas when certain sugars are not fully digested or absorbed. For example, lactose intolerance involves low levels of the enzyme lactase, while fructose may cause symptoms when it is not fully absorbed. Keeping a food diary can help identify your personal trigger foods.

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