Kefir is a fermented dairy product that contains plenty of probiotics, but this tart beverage doesn't last forever. Here's ...

While the plant-based revolution might have reduced the amount of lactose in our diets, certain dairy-based foods are making a comeback in the name of good health, and kefir is one of them.

Kefir is packed with probiotics and is a tangy cross between milk and yogurt. It has calcium and vitamin D and delivers about 10 grams of protein per cup. The fermentation process helps break down ...