How long do dairy kefir grains last? How long does the powdered Kefir Starter Culture last?
A. If cared for properly, milk kefir grains have an unlimited life span and can be used repeatedly to make kefir. Powdered kefir starter culture can be used a number of times but the exact number is dependent on several factors including personal hygiene, cleanliness of the container and utensils (soap is detrimental to kefir culture), etc.