Kefir contains 30-50 different strains of beneficial bacteria and yeasts — significantly more diverse than regular yogurt. The fermentation process breaks down most of the lactose, making it tolerable for many people with lactose intolerance. One cup provides 30% of daily calcium, significant B12, and a complete probiotic dose.
Available at most grocery stores (Lifeway is the most common brand). Price is comparable to yogurt. The lactose intolerance that affects 70%+ of Black Americans is addressed by the fermentation — most people with lactose intolerance tolerate kefir.
Kefir's L. kefiri strain has documented ability to inhibit pathogens like Salmonella and H. pylori. The 30+ microbial strains produce Vitamin K2 (directs calcium to bones not arteries), B12, and folate during fermentation. Kefir consistently outperforms yogurt in clinical trials for gut microbiome diversity improvement. Lactobacillus rhamnosus (found in kefir) is the specific strain with most documented anxiety reduction in RCTs.
Plain, unsweetened kefir is the protocol form — flavored kefir is high in added sugar. Drink 1 cup daily, or use as a yogurt substitute in smoothies and dressings. Coconut kefir or water kefir are dairy-free alternatives made with kefir grains.
Free, no account needed to ask.