Soy-based Diets can Improve Women's Bone Health

Women undergoing menopause may benefit from soy protein to improve their bone health, reports a new study. The team of researchers also believe that soy protein might have a positive influence on bone health of women who have not yet reached menopause. The findings of the study are published in the journal Bone Reports.

Osteoporosis, decreased physical activity and weight gain are serious health concerns for postmenopausal women.

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‘Women may improve bone strength by adding some soy-based whole foods to their diets, such as tofu and, soy milk. ’

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"The findings imply that all women might see increased bone health by adding some soy-based whole foods," said Pamela Hinton, professor of nutrition and exercise physiology. "We also believe that soy-based diets can improve metabolic function for postmenopausal women."

Hinton and Victoria Vieira-Potter, co-author and associate professor of nutrition and exercise physiology, studied the effects of soy versus corn-based diets on rats selectively bred to have low fitness levels. Rats were again divided between those with and without ovaries to mimic effects of menopause. Prior research has found that these rats are good models for menopausal women. They compared the impact of the soy diet on bone strength and metabolic function to rats fed a corn-based, soy-free diet.

"Prior research has shown that these rats are good models, average American women are relatively inactive both before, and especially after, menopause," Vieira-Potter said. "As such, understanding how dietary protein sources, such as soy, can impact metabolism and bone health in these rats can help us better understand how such diets might impact women's health across the lifespan."

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Perimenopause is a transition phase that lasts until menopause. The low estrogen levels during this phase cause irregular periods and early menopause symptoms such as hot flashes. This phase may last from a few months to years.

The researchers found that the tibia bones of the rats that were fed soy were stronger compared to the rats who were fed the corn-based diet, regardless of ovarian hormone status. Moreover, they found that the soy-based diet also improved the metabolic function of the rats both with and without ovaries.

"Bottom line, this study showed that women might improve bone strength by adding some soy-based whole foods to their diet," Hinton said. "Our findings suggest that women don't even need to eat as much soy as is found in typical Asian diets, but adding some tofu or other soy, for example, foods found in vegetarian diets, could help strengthen bones."

What is Menopause?
Menopause is defined as the state of permanent cessation of menstrual cycles (periods) for 12-months.

Source-Eurekalert

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