Kefir is a fermented dairy product rich in probiotics, vitamins, and minerals. Research suggests it may support gut health, improve digestion, and have anti-inflammatory effects. However, many studies are small or animal-based, so evidence for specific health claims in humans is often moderate. MyBody-X does not directly test for kefir-related markers, but its gut microbiome, lactose intolerance, or nutrient deficiency tests could help individuals understand their personal response. Caution is advised for those with lactose intolerance, as kefir still contains some lactose. Overall, kefir can be a healthy addition to the diet, but it is not a cure-all. Evidence grade: mixed (some human studies, but limited).
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