What is leaky gut? When the small intestine is working well, nutrients are passed into the bloodstream via the intestinal lining. In a “leaky gut” that lining becomes more permeable, allowing bigger particles through. + Why is it a big deal? Because research suggests having a leakier than normal gut may be associated with health problems such as malnutrition, diabetes and digestive disorders. Many complementary medicine practitioners believe it can also cause a much wider list of symptoms. + What can be done about it? Collagen Hydrolysate supplements are one area of promising research in treating leaky gut.