Kefir is made by adding kefir grains, which contain yeast and good bacteria, to cow, goat or sheep milk. The microorganisms convert lactose (milk sugar) into lactic acid, giving it a sour taste and adding lots of nutrients.
It’s loaded with vitamins, minerals and nutrients, including:
Calcium.
Magnesium.
Protein.
Riboflavin (vitamin B2).
Vitamin B12.
Vitamin D.