Because kefir is a fermented milk product, it contains a similar nutrient profile and shares many benefits with yogurt. In addition to being rich in gut health-boosting probiotics, kefir is also a great source of calcium, protein, vitamin A, vitamin K2, and magnesium.
A 100-gram serving of kefir provides 130 mg of calcium, four grams of protein, and 12 mg of magnesium.

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