Kefir grains can be purchased online from specialized fermentation retailers, marketplaces like Etsy and Amazon , or shared through community groups. For the best results, look for "live" grains, which are active and ready to ferment immediately, though dehydrated options are also available for longer shelf lives during shipping. Recommended Online Retailers

: A well-known source for both Milk Kefir Grains and Water Kefir Grains

Marketplaces offer variety and often feature small-scale, experienced sellers with high ratings. Where can I buy kefir grains? - Facebook