What are Probiotics?
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Etymologically, Probiotic stands for pro ("for") and the Greek adjective bios ("life")
According to FAO/WHO: Probiotics are "Live microorganisms which when administered in adequate amounts confer a health benefit on the host".
Probiotic bacteria in general belong to a special category of friendly bacteria viz. lactic acid bacteria (LAB). Lactobacilli and bifidobacteria are the two key members of this group used extensively as probiotics. However, certain yeasts like Saccharomyces boulardii is also included in this group and found to be helpful in promoting human health. Probiotics are commonly consumed as part of fermented foods with specially added active live cultures; such as in yogurt, dahi, yakult or as dietary supplements.