30g of kefir grains to make a liter of kefir milk Benefits: Contains huge amounts of probiotics (beneficial bacteria) that balance the gut environment and treat bloating.. Immune booster: Helps improve the body's response to diseases thanks to its bioactive compounds. Bone health: It is an excellent source of calcium and vitamin K_2, which reduces the risk of osteoporosis. Suitable for lactose intolerance: The fermentation process breaks down most of the milk sugar (lactose), so it often does not cause digestive problems for those with sensitivity to it.