Kéfir grains. If you’ve ever poked around the world of homemade probiotics, you’ve probably heard the name—and maybe you’ve even scratched your head trying to figure out what they are, or why folks are obsessed …


Kéfir grains. If you’ve ever poked around the world of homemade probiotics, you’ve probably heard the name—and maybe you’ve even scratched your head trying to figure out what they are, or why folks are obsessed …