Milk kefir grains have 20 times more pre-biotic good bacteria than yogurt. I am selling excellent healthy milk kefir grains for $5 per tablespoon. Each tablespoon of grains can make one cup of kefir daily. It only takes a few minutes of day to make this super food.They will grow and continue to reproduce. Eventually you can sell them yourself or just save them and eat them when you want to have an immune system boost.