By studying ovariectomized rats, Chen and colleagues determined that kefir, given daily over a 12 week period not only reduced CTX (a bone resorption marker indicative of osteoclast bone resorbing activity) but also actually prevented bone loss. The kefir improved bone mineral density as well as trabecular strength properties as measured through micro-CT scanning.
The authors concluded that kefir “may have the potential to prevent or treat osteoporosis in humans resulting from estrogen deficiency.”
Chen, H.L., et al. 2014. Kefir improves bone mass and microarchitecture in an ovariectomized rat model of postmenopausal osteoporosis. Osteoporosis Int DOI 10.1007/s00198-014-2908-x.