Think of your intestine as a mesh-lined, flexible channel rather than a steel pipe that simply shuttles substances like blood, water, and food from one place to the next. Normally, that mesh is small enough to block toxins while still allowing nutrients and electrolytes to pass into your bloodstream.
But with so-called leaky gut, that mesh is believed to be expanded due to inflammation, and that allows the bad stuff to get into your blood, too. This is an idea called intestinal permeability, or hyperpermeability. Basically, the mucus lining of the intestine may be “leaking” bacteria and other infectious agents into areas where it shouldn’t, which is thought to trigger symptoms such as:
- Burning sensation in the gut
- Diarrhea
- Fatigue
- Gas and bloating, caused by overgrown bacteria
- Painful indigestion
- Nausea or vomiting
It’s likely that “leaky gut” as a term was popularized because it’s catchy — after all, “intestinal permeability” isn’t much of a hashtag — and also because it’s easy to understand, says Dr. George. Basically, it simplifies the complexity of intestinal lining function in a way that provides insight into how intestinal barrier issues could impact your health.
Whatever you’re calling it, issues with your intestinal lining can have a real impact on your digestive health and can also be a warning sign of a bigger problem.
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