New studies on soy health benefits

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Related tags: Osteoporosis

On June 22, a new research presented at ENDO 2001, the 83rd Annual
Meeting of The Endocrine Society, which was held in Denver, US,
shows a link between...

On June 22, a new research presented at ENDO 2001, the 83rd Annual Meeting of The Endocrine Society, which was held in Denver, US, shows a link between postmenopausal health and dietary phyto-oestrogens. A panels of researchers presented three new studies, which all demonstrate that phyto-oestrogens may benefit the health and, specifically, bones of postmenopausal women. In a study done in China, researchers studied 357 postmenopausal Chinese women to determine whether a link exists between dietary phyto-oestrogen intake and bone mineral density. Among the subjects, the average phyto-oestrogen intake was 21 mg/day, which is seven times more than that of the Western population. The study showed a link between high phyto-oestrogen intake and increases in bone mineral density. "We found that women who ate 60 milligrams of phytoestrogens per day, which is the equivalent of two pieces of tofu or 3 cups of soymilk, had stronger bones,'​ said Dr. Annie Kung, Professor at the University of Hong Kong, Queen Mary Hospital, who presented the study at the press conference. "These results suggest that phyto-oestrogens might help protect women's bones as they go through menopause."​ Another study, which was presented by Dr. Trent Lund, an endocrinologist and researcher at Colorado State University, found a link between a diet high in phyto-oestrogens and decreases in body fat, body weight, prostate weight and blood pressure as well as alterations in insulin and leptin levels in adults. In the study, male and female rats were fed either a phyto-oestrogen-rich diet or a phyto-oestrogen-free diet. The research showed that leptin levels significantly increased in both male and female rats that were fed phyto-oestrogen-rich diets compared with rats who received phyto-oestrogen-free diets. According to Dr. Lund, "the insulin levels in female rats fed the phyto-oestrogen-rich diets were also significantly increased compared with females fed the phyto-oestrogen free diet."​ In addition, Dr. Lee-Jane Lu, an investigator in nutrition research, and her colleagues at the University of Texas Medical Branch in Galveston, presented a study conducted in the university's General Clinical Research Center that examined whether soy consumption alters bone metabolism in postmenopausal women. The researchers studied the markers that reflect bone turnover in 12 healthy, postmenopausal women not on hormone replacement therapy. The women were studied before, during and after they ate a soy diet containing 112 mg of isoflavones for 16 weeks. "Our findings suggest that soy consumption may stimulate bone turnover or formation,"​ said Dr. Lee-Jane Lu. "Additional studies are now needed to determine whether soy diets have a long term beneficial effect on bone and a direct impact on fracture rates in women."​ Source: The Endocrine Society

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