Featured Research

from universities, journals, and other organizations

Scientists Dispel Late-Night Eating/Weight Gain Myth

Date:
February 2, 2006
Source:
Oregon Health & Science University
Summary:
Scientists at the Oregon National Primate Research Center at Oregon Health & Science University believe they have helped dispel the myth that late-night eating causes weight gain. The research is published in the current edition of the journal Obesity Research.

Scientists at the Oregon National Primate Research Center at Oregon Health & Science University believe they have helped dispel the myth that late-night eating causes weight gain. The research is published in the current edition of the journal Obesity Research.

"We've all been told at one point in our lives that we should avoid eating meals late at night as it will lead to weight gain. However, our research in rhesus monkeys, which are considered an excellent model for studying primate (man and monkey) obesity issues, showed that eating at night is no more likely to promote weight gain than eating during the day. Of course this research does not suggest that snacking at night after eating your normal daily ration of calories is a good idea, " said Judy Cameron, Ph.D., a senior scientist in the Divisions of Reproductive Sciences and Neuroscience at the OHSU Oregon National Primate Research Center. Cameron also is a professor of psychiatry at the University of Pittsburgh.

To conduct this research, scientists studied 16 female rhesus monkeys that were placed on a high-fat diet similar in composition to the diet normally consumed by humans in the United States and other Western countries. During the study, all of the monkeys had their ovaries removed - this simulates a menopause-like state in female monkeys similar to human female menopause. In lower animals both high fat diet and decreased ovarian function lead to weight gain. The contribution of menopause to weight gain in middle-aged women has not been well established, perhaps because many other life style changes generally occur during this period of life, such as changes in eating habits and exercise habits as children grow up and leave home. In this study monkeys did gain about 5% more weight after their ovaries were removed providing clear evidence that ovarian hormones contribute to weight balance in primates, as well as in lower animals. These results were presented at the 2003 Society for Neuroscience Meeting.

The researchers then observed the monkeys for one year. In addition to studying their weight gain, researchers noted how much and when the animals ate, which varied dramatically among the animals observed. Specifically, the researchers found that the monkeys ate between 6 percent and 64 percent of their total calories at night. This is comparable to reports in humans who take in approximately 24 percent to 65 percent of total calories at night.

"It was really interesting to see that the monkeys who ate most of their food at night were no more likely to gain weight than monkeys who rarely ate at night," said Elinor Sullivan, an OHSU graduate student conducting research along with Cameron at the Oregon National Primate Research Center. "This suggests that calories cause weight gain no matter when you eat them."

The ONPRC is a registered research institution, inspected regularly by the United States Department of Agriculture. It operates in compliance with the Animal Welfare Act and has an assurance of regulatory compliance on file with the National Institutes of Health. The ONPRC also participates in the voluntary accreditation program overseen by the Association for Assessment and Accreditation of Laboratory Animal Care International.


Story Source:

The above story is based on materials provided by Oregon Health & Science University. Note: Materials may be edited for content and length.


Cite This Page:

Oregon Health & Science University. "Scientists Dispel Late-Night Eating/Weight Gain Myth." ScienceDaily. ScienceDaily, 2 February 2006. <www.sciencedaily.com/releases/2006/02/060202080832.htm>.
Oregon Health & Science University. (2006, February 2). Scientists Dispel Late-Night Eating/Weight Gain Myth. ScienceDaily. Retrieved October 20, 2014 from www.sciencedaily.com/releases/2006/02/060202080832.htm
Oregon Health & Science University. "Scientists Dispel Late-Night Eating/Weight Gain Myth." ScienceDaily. www.sciencedaily.com/releases/2006/02/060202080832.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

How Nigeria Beat Its Ebola Outbreak

How Nigeria Beat Its Ebola Outbreak

Newsy (Oct. 20, 2014) The World Health Organization has declared Nigeria free of Ebola. Health experts credit a bit of luck and the government's initial response. Video provided by Newsy
Powered by NewsLook.com
Another Study Suggests Viagra Is Good For The Heart

Another Study Suggests Viagra Is Good For The Heart

Newsy (Oct. 20, 2014) An ingredient in erectile-dysfunction medications such as Viagra could improve heart function. Perhaps not surprising, given Viagra's history. Video provided by Newsy
Powered by NewsLook.com
Ebola Worries End for Dozens on U.S. Watch Lists

Ebola Worries End for Dozens on U.S. Watch Lists

Reuters - US Online Video (Oct. 20, 2014) Forty-three people who had contact with Thomas Eric Duncan, the first person diagnosed with Ebola in the U.S., were cleared overnight of twice-daily monitoring after 21 days of showing no symptoms. Rough Cut (no reporter narration). Video provided by Reuters
Powered by NewsLook.com
Fauci: Ebola Protocols to Focus on Training

Fauci: Ebola Protocols to Focus on Training

AP (Oct. 20, 2014) Dr. Anthony Fauci, head of the National Institute of Allergy and Infectious Diseases, says he expects revised CDC protocols on Ebola to focus on training, observation and ensuring health care workers are more protected. (Oct. 20) Video provided by AP
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