1. Puerarin
Puerarin, an isoflavone from the kudzu plant, has osteoprotective properties. Ovariectomy-induced mice are often used for researching treatments for postmenopausal osteoporosis. In a systematic review of eight such animal studies with 203 subjects, puerarin significantly improved bone mass.[i]
Puerarin alleviates osteoclast-related loss of bone mass in ovariectomy-induced osteoporotic rats by inhibiting the tumor necrosis factor receptor–associated factor/reactive oxygen species or TRAF6/ROS-dependent MAPK/NF-κB signaling pathway within the bone tissue.[ii]
In an osteoporosis model of overiectomized rats, the anti-osteoporosis effects of puerarin were related to improvements in gut microbiota via regulating short chain fatty acid levels and repairing the intestinal mucosal integrity.[iii]
A high dose of puerarin and zinc together in an ovariectomized rat model worked better than either alone -- reversing some bone loss and suppressing the adiposity of bone marrow, a marker of osteoporosis.[iv]
Type 1 and Type 2 diabetes are often associated with increased risk of bone fractures, osteopenia and osteoporosis. In a diabetes-induced study of mice, puerarin markedly attenuated bone loss and suppressed inflammatory markers associated with osteoporosis by inhibiting histone deacetylases (HDAC1/HDAC3) enzyme signaling.[v]
In another study of diabetes-induced rats, those given a puerarin injection of 100 milligrams (mg) per kilogram of body weight per day for six weeks had higher bone mineral density, improved osteoblast numbers, new bone formation and reduced caspase-3 expression -- a marker for diabetic osteoporosis -- compared to the control group.[vi]
