Explanation:

The term came into more common use after 1980. The introduction of the concept (but not the term) is generally attributed to Nobel laureate Elie Metchnikoff, who postulated that yogurt-consuming Bulgarian peasants lived longer lives because of this custom.

Probiotics are live microorganisms that are intended to have health benefits when consumed or applied to the body. They can be found in yogurt and other fermented foods, dietary supplements, and beauty products.

Curd or yogurt is a very important probiotic that assists gut bacteria to digest food and maintain the health of intestinal walls.