What is Kefir? Kefir, known as the Champagne of Dairy, has been enjoyed for over 2000 years. The probiotic cultures found in this bottle may help support immunity and healthy digestion and have contributed to the extensive folklore surrounding this beverage. Referred to in ancient texts, kefir is more than a probiotic superfood; kefir is a storied historic artifact. The Lifeway Story Since crafting the first batches of our Lifeway Kefir in 1986, we've been dedicated to producing the best tasting kefir and highest quality probiotic products. Today, we're proudly living the American Dream and are excited to share the wonders of kefir and the joys of good health with your family. - The Smolyansky Family.