Probiotic

Probiotics are live microorganisms that, when consumed in sufficient amounts, have been scientifically shown to benefit the host by supporting the gut microbiome. They occur naturally in fermented foods such as yogurt, kefir, kombucha and pickles, and can also be taken as supplements in capsule or powder form. Their effects vary by species and strain — so "probiotic" is not a single substance but a broad category encompassing many different bacteria and yeasts.