Kefir is a fermented milk drink that originated in the Caucasus region.
Kefir grains are a combination of bacteria and yeasts in a matrix of proteins, lipids, and sugars. This symbiotic matrix forms "grains" that resemble cauliflower. Many different bacteria and yeasts are found in the kefir grains, which are a complex and highly variable community of micro-organisms termed probiotics.

At the moment i only have one small to offer. But i can provide more at a rate of a month.