Soy isoflavones, well known for their heart health benefits, are gaining traction in the bone health category thanks to new research showing their effects on postmenopausal bone calcium retention8. Researchers tested risedronate (a bisphosphonate) as well as five different soy isoflavone oral supplements (two doses of a genistein-rich soy supplement, and three doses of mixed isoflavones in various proportions) on a group of 24 women. Each formula was tested separately, with each treatment lasting 50 days and separated by a 50-day washout period. The most effective isoflavone intervention delivered 105 mg of isoflavones as genistein, daidzein, and glycitein in natural ratios. It increased bone calcium retention by 7.6%. And although risedronate delivered a 15.3% increase in bone calcium retention, researchers concluded that the soy isoflavones were nonetheless an effective bone-preserving agent.
Indeed, going forward, the bone health category can only benefit from research that focuses on novel ingredients and creative delivery systems that broaden overall access to bone-building and bone-protecting supplements. “When we expected to live to be 70, we did not care too much about the possibility of falling and breaking a hip. Now that we can expect to live to our 90s, protecting old bones is crucial to our quality of life,” says Blue California’s McCollum.
Melissa Kvidahl is a freelance journalist and copywriter specializing in the health and wellness industry.
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