Kefir is a fermented milk drink that is rich in nutrients and contains various probiotics. It is especially beneficial for osteoporosis. Kefir is an excellent source of calcium and also contains vitamin K2, which plays a crucial role in calcium metabolism, helping to enhance bone health and reduce fracture risk. Animal studies have shown that kefir can increase calcium absorption in bone cells, leading to improved bone density and fracture prevention. Therefore, kefir has significant potential in improving osteoporosis symptoms.