Skip to content

Menopause Health Center

Font Size

Soy Benefits May Have Age Cutoff

Health Protection Escape Women When Supplements Started After Age 60
WebMD Health News

July 6, 2004 -- With thousands of studies having been done, soy protein has emerged as one of the most researched foods in science. Even with this much information, studies still show conflicting results on the effects of this much ballyhooed protein.

From tempering menopausal symptoms to reducing the risk of several health problems that plague women following it, some women still turn to soy as an alternative to traditional estrogen therapy.

And yet in the latest study, researchers from the Netherlands find that daily soy supplements did not help preserve a women's thinking ability or bone density. The study also showed no evidence that the supplement provided heart protection by improving women's cholesterol levels following menopause.

Why the sudden departure from previous findings that have supported a beneficial effect from soy, the plant-derived estrogen-like compound? Perhaps because the women studied were between ages 60 and 75 when they started taking soy proteins -- when they may have been too old to reap its reported benefits.

Don't Wait too Long

"Timing is certainly a reasonable explanation as to why we didn't find an effect from soy in the women studied," researcher Sanne Kreijkamp-Kaspers, MD, PhD, tells WebMD.

"We know that immediately after menopause, there's a huge decline in bone loss and that's when [bad] cholesterol levels tend to increase," she says. "It could be that if you give soy before a woman reaches menopause, it is effective at preventing this."

If supplementation begins a decade of so after menopause, it may be too late, she explains.

In her study, published in this week's Journal of the American Medical Association, 200 women received either 25 grams of soy protein each day via a powder that could be mixed with food or beverages or a phony powder package. Each daily dose of soy contained 99 milligrams of isoflavones, such as genisten and diadzein, the most common form of phytoestrogen.

None of the women had ever consumed soy supplements prior to the study, according to Kreijkamp-Kaspers, an epidemiologist at University Medical Center in Utrecht. "Soy is not as popular in the Netherlands as it is in the U.S.," she explains.

1 | 2 | 3

Today on WebMD

woman walking outdoors
How to handle headaches, night sweats, and more.
mature woman holding fan in face
Symptoms and treatments.
woman hiding face behind hands
11 ways to keep skin bright and healthy.
Is it menopause or something else?
senior couple
mature woman shopping for produce
Alcohol Disrupting Your Sleep
mature couple on boat

Pollen counts, treatment tips, and more.

It's nothing to sneeze at.

Loading ...

Sending your email...

This feature is temporarily unavailable. Please try again later.


Now check your email account on your mobile phone to download your new app.

mature woman tugging on her loose skin
senior woman wearing green hat
estrogen gene