How can I repopulate my gut with good bacteria?

Lactic acid–producing bacteria can be taken as oral supplements to help repopulate your gut with the good kinds of bacteria. (These bacteria are short lived, so you have to re-dose often.) They help with ailments ranging from too much gas to irritable bowel syndrome to a weakened immune system that tolerates gingivitis. Lactobacilli, for example, have been used in the food industry for many years because they are able to convert sugars (including lactose) and other carbohydrates into lactic acid.

This not only provides the characteristic sour taste of fermented dairy foods such as yogurt but acts as a preservative by lowering the food's pH and creating fewer opportunities for spoilage organisms to grow. Add these to your diet: yogurt, kefir, sauerkraut, and kimchi (a Korean dish of pickled vegetables).

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