Buzz
Soy is undeniably a nutritional powerhouse. However, what currently captivates researchers is not just its nutrient richness but its phytoestrogen content, especially its isoflavones and their potential effects on women's health during midlife. The key isoflavones in soy are genistein and daidzein.
Cardiovascular Benefits. Studies show that soy protein lowers LDL cholesterol, its most well-established benefit, and often boosts HDL cholesterol. Soy isoflavones also possess antioxidant qualities that shield LDL cholesterol from oxidation. Additionally, the isoflavone genistein may enhance blood vessel flexibility.
Bone Strength. Soy's potential in lowering osteoporosis risk is a promising and emerging field of study. A key reason for exploring soy's impact on bone health is that its isoflavones resemble synthetic estrogens such as tamoxifen and ipriflavone, which have proven effective in preventing or slowing bone loss.
Menopause Relief. Soy's role in alleviating peri- and postmenopausal symptoms is a cutting-edge area of research. Epidemiological evidence suggests that Asian women experience fewer hot flashes and night sweats compared to their Western counterparts. A recent study found that adding 60 g of soy protein isolate to the daily diet significantly reduced hot flash frequency in some postmenopausal women.
While phytoestrogen supplements are on the market, their effectiveness and safety remain uncertain. In contrast, many phytoestrogen-rich foods have been safely consumed for centuries. Enjoy a soy-based drink for breakfast, add soy milk to your coffee, snack on roasted soy nuts, or mix a few tablespoons of soy protein into your juice. These choices provide between 10 g to 30 g of soy protein and 20 mg to 60 mg of isoflavones.
Susan Calvert Finn, PhD, RD, FADA, serves as the director of the Nutrition Services Department at Ross Products Division, Abbott Laboratories. Abbott Laboratories is a member of the Healthcare Leadership Council.
© 1999 Healthcare Leadership Council
