Bifidobacterium breve (B. breve) is a type of probiotic ("good" bacteria) that lives in the intestines. It produces lactic and acetic acid in the gut.

"Good" bacteria such as B. breve can help break down food, absorb nutrients, and fight off "bad" organisms that might cause diseases. B. breve is commonly found in the gut of breastfed infants and in the vagina.

People use B. breve for age-related decline in memory and thinking, blood infections, and many other purposes, but there is no good scientific evidence to support these uses. There is also no good evidence to support using B. breve for COVID-19.

Don't confuse B. breve with other probiotics, or with fermented food products such as fermented milk, kefir, or yogurt. These are not the same.

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