Featured Research

from universities, journals, and other organizations

Soy Protects Heart Without Disrupting Hormones: Study

Date:
April 5, 2000
Source:
University Of Toronto
Summary:
Adding soy foods to a healthy diet reduces the risk of heart disease without stimulating harmful hormone activity, according to a new study in the journal Metabolism.

Adding soy foods to a healthy diet reduces the risk of heart disease without stimulating harmful hormone activity, according to a new study in the journal Metabolism. Some people have been discouraged from eating soy because of claims that the estrogen in it may produce dangerously high levels of hormones in the body, says Professor David Jenkins of the University of Toronto's department of nutritional sciences and the Clinical Nutrition and Risk Factor Modification Centre, St. Michael's Hospital. "The concerns have been whether soy estrogen might lead to hormone-dependent breast cancer or abnormal sexual development in children, yet we found no evidence to support this."

The study involved two groups of people put on a low-fat diet over two one-month periods - one diet with soy foods and the other without. To determine the estrogen level resulting from each diet, the researchers collected urine for 24 hours from all the participants at the end of each month and tested it on human breast cancer cells. Since estrogen stimulates breast cancer cells to produce a special protein, the researchers measured the amount of this protein produced by each urine sample to calculate how much estrogen was present.

The total estrogenic activity in the urine of women on soy was actually slightly less than before they started the diet. "This finding suggests that soy may not have the estrogenic effects that were thought to alleviate menopausal symptoms but it refutes claims about its purported hormone risks," Jenkins says.

The study also discovered that soy reduces the risk of heart disease by lowering levels of oxidized cholesterol, which is taken up more rapidly by coronary artery walls to form dangerous plaques. Jenkins' previous research has already shown that soy consumption reduces cholesterol in general while also decreasing the amount of "bad" (LDL) cholesterol in the body and maintaining the amount of "good" (HDL) cholesterol. According to Jenkins, this confirms that soy should be promoted for its important role in preventing heart disease without fear.

Funding for this study was provided by the University-Industry Research Partnership Program of the Natural Sciences and Engineering Research Council, the Ontario Ministry of Agriculture, Food and Rural Affairs and Loblaw Brands, Toronto.

CONTACT:
Steven de Sousa
U of T Public Affairs
(416) 978-5949
steven.desousa@utoronto.ca


Story Source:

The above story is based on materials provided by University Of Toronto. Note: Materials may be edited for content and length.


Cite This Page:

University Of Toronto. "Soy Protects Heart Without Disrupting Hormones: Study." ScienceDaily. ScienceDaily, 5 April 2000. <www.sciencedaily.com/releases/2000/04/000404170723.htm>.
University Of Toronto. (2000, April 5). Soy Protects Heart Without Disrupting Hormones: Study. ScienceDaily. Retrieved October 20, 2014 from www.sciencedaily.com/releases/2000/04/000404170723.htm
University Of Toronto. "Soy Protects Heart Without Disrupting Hormones: Study." ScienceDaily. www.sciencedaily.com/releases/2000/04/000404170723.htm (accessed October 20, 2014).

Share This



More Health & Medicine News

Monday, October 20, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Microneedle Patch Promises Painless Pricks

Microneedle Patch Promises Painless Pricks

Reuters - Innovations Video Online (Oct. 18, 2014) Researchers at The National University of Singapore have invented a new microneedle patch that could offer a faster and less painful delivery of drugs such as insulin and painkillers. Video provided by Reuters
Powered by NewsLook.com
Raw: Nurse Nina Pham Arrives in Maryland

Raw: Nurse Nina Pham Arrives in Maryland

AP (Oct. 17, 2014) The first nurse to be diagnosed with Ebola at a Dallas hospital walked down the stairs of an executive jet into an ambulance at an airport in Frederick, Maryland, on Thursday. Pham will be treated at the National Institutes of Health. (Oct. 16) Video provided by AP
Powered by NewsLook.com
Raw: Cruise Ship Returns to US Over Ebola Fears

Raw: Cruise Ship Returns to US Over Ebola Fears

AP (Oct. 17, 2014) A Caribbean cruise ship carrying a Dallas health care worker who is being monitored for signs of the Ebola virus is heading back to Texas, US, after being refused permission to dock in Cozumel, Mexico. (Oct. 17) Video provided by AP
Powered by NewsLook.com
Spanish Govt: Four Suspected Ebola Cases in Spain Test Negative

Spanish Govt: Four Suspected Ebola Cases in Spain Test Negative

AFP (Oct. 17, 2014) All four suspected Ebola cases admitted to hospitals in Spain on Thursday have tested negative for the deadly virus in a first round of tests, the government said Friday. Duration: 00:55 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins