Featured Research

from universities, journals, and other organizations

Diet During Puberty Influences Sex Hormone Levels, Possibly Breast Cancer Risk

Date:
January 15, 2003
Source:
Journal Of The National Cancer Institute
Summary:
A modest reduction in fat intake during puberty is associated with changes in the levels of certain sex hormones, according to a study of adolescent girls in the January 15 issue of the Journal of the National Cancer Institute. In adults, elevated levels of sex hormones are associated with an increase in breast cancer risk.

A modest reduction in fat intake during puberty is associated with changes in the levels of certain sex hormones, according to a study of adolescent girls in the January 15 issue of the Journal of the National Cancer Institute. In adults, elevated levels of sex hormones are associated with an increase in breast cancer risk.

Related Articles


Joanne F. Dorgan, Ph.D., of the Fox Chase Cancer Center in Philadelphia, and her colleagues conducted a study ancillary to the Dietary Intervention Study in Children to examine whether diet influences sex hormone levels during adolescence. The study involved 286 girls ages 8 to 10 who were randomly assigned to a low-fat dietary intervention group or to a group receiving usual care (e.g., educational materials available to the public). The researchers measured blood sex hormone levels at the start of the study and 1, 3, 5, and 7 years later.

After 5 years, girls in the intervention group had 29.8% lower estradiol, 30.2% lower non-sex hormone binding globulin-bound estradiol, 20.7% lower estrone, and 28.7% lower estrone sulfate levels during the first half of their menstrual cycles and 27.2% higher testosterone levels during the second half of their menstrual cycles compared with girls in the usual care group. After 7 years, girls in the intervention group had half the progesterone levels during the second half of their menstrual cycles as did girls in the usual care group.

Girls in the intervention group reported consuming less total and saturated fat overall than girls in the usual care group. Girls in the intervention group also reported consuming more dietary fiber.

Although their study found that a low-fat diet resulted in reductions in estrogen hormone concentrations, the authors say that "whether these differences ultimately influence breast cancer risk is unknown." A parallel study was conducted in boys, and results will be reported separately.


Story Source:

The above story is based on materials provided by Journal Of The National Cancer Institute. Note: Materials may be edited for content and length.


Cite This Page:

Journal Of The National Cancer Institute. "Diet During Puberty Influences Sex Hormone Levels, Possibly Breast Cancer Risk." ScienceDaily. ScienceDaily, 15 January 2003. <www.sciencedaily.com/releases/2003/01/030115065844.htm>.
Journal Of The National Cancer Institute. (2003, January 15). Diet During Puberty Influences Sex Hormone Levels, Possibly Breast Cancer Risk. ScienceDaily. Retrieved February 26, 2015 from www.sciencedaily.com/releases/2003/01/030115065844.htm
Journal Of The National Cancer Institute. "Diet During Puberty Influences Sex Hormone Levels, Possibly Breast Cancer Risk." ScienceDaily. www.sciencedaily.com/releases/2003/01/030115065844.htm (accessed February 26, 2015).

Share This


More From ScienceDaily



More Health & Medicine News

Thursday, February 26, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Sleeping Too Much Or Too Little Might Increase Stroke Risk

Sleeping Too Much Or Too Little Might Increase Stroke Risk

Newsy (Feb. 26, 2015) People who sleep more than eight hours per night are 45 percent more likely to have a stroke, according to a University of Cambridge study. Video provided by Newsy
Powered by NewsLook.com
London Show Dissects History of Forensic Science

London Show Dissects History of Forensic Science

AFP (Feb. 25, 2015) Forensic science, which has fascinated generations with its unravelling of gruesome crime mysteries, is being put under the microscope in an exhibition of real criminal investigations in London. Duration: 00:53 Video provided by AFP
Powered by NewsLook.com
Michigan Couple Celebrates Identical Triplets

Michigan Couple Celebrates Identical Triplets

AP (Feb. 25, 2015) A suburban Detroit couple who have two older children are adjusting to life after becoming parents to identical triplets _ a multiple birth a doctor calls rare. (Feb. 25) Video provided by AP
Powered by NewsLook.com
Mayor Says District of Columbia to Go Ahead With Pot Legalization

Mayor Says District of Columbia to Go Ahead With Pot Legalization

Reuters - News Video Online (Feb. 25, 2015) Washington&apos;s mayor says the District of Columbia will move forward with marijuana legalization, despite pushback from Congress. Rough Cut (no reporter narration). Video provided by Reuters
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