weight loss

Dieting May Disrupt Women’s Sleep

IRP Study Reveals Influence of Calorie Intake and Reproductive Cycle on Sleep

woman yawning at work

Doctors have long emphasized the importance of maintaining a healthy body weight and getting enough sleep, but in our time-limited lives, we often have to choose between spending time exercising, preparing healthy meals, and getting sufficient shuteye. And the number of hours in the day may not be the only thing that pits weight loss against sleep. A recent IRP study suggests that young women who are not obese get poorer sleep when they change their diets in order to lose weight.

Metabolic Inflexibility Drives Increased Appetite

IRP Research Could Aid Personalized Weight Loss Recommendations

person eating an over-sized burger

We all know the stereotype of the picky child who shuns vegetables unless they’re smothered in ranch dressing or cheese. Surprisingly, the human body can also be similarly choosy about how it fuels itself. New IRP research shows that people whose bodies prefer to raid their sugar depots rather than use stored fat during a period without food consume more calories after their fast, suggesting a possible explanation for why some people are more prone to gaining weight over time or have less success with certain weight loss interventions.

Scouting Out Summer Poster Day

Annual Event Held In-Person for First Time in Four Years

Amia Black poses with her poster at Summer Poster Day

A few weeks ago, NIH’s Natcher Conference Center bustled with the youthful scientific enthusiasm of IRP summer interns for the first time since 2019, the last time that the IRP’s Summer Poster Day was held in-person. At this year’s event, held on August 3 and 4, the hundreds of high school and college students who conducted research in IRP labs as part of NIH’s Summer Internship Program this year eagerly showed off the fruits of their labors — from discoveries about how weight loss drugs affect the brain to new insights into a potential treatment target for age-related vision loss. Read on to learn more about a few of these scientific upstarts and the research revelations they’ve helped uncover.

Attempting Weight Loss Linked to Reduced Risk of Death

IRP Research Overturns Common Concerns About ‘Weight Cycling’

man chopping vegetables in his kitchen

With 2021 less than a month away, many of the more than 200 million Americans who are overweight or obese are beginning to consider making weight loss their New Year’s resolutions — perhaps not for the first time. While trying to lose weight only to ultimately regain it may be disappointing, a new IRP study suggests that repeated attempts at weight loss significantly reduce a person’s risk of dying.

Extreme Obesity Shaves Years Off Life Expectancy

Four Questions with Dr. Cari Kitahara

a man with obesity walking in the park

As happens with every new year, many people around the world woke up on January 1 committed to improving their health through eating well and exercising. These lifestyle changes have the potential to significantly improve the well-being of the 32 percent of American adults who are overweight and the 40 percent who are obese. Due to the staggering number of individuals struggling with obesity, as well as its serious health consequences, the condition has long been a main priority for researchers at the NIH. As a result of this focus, investigators have made significant strides in identifying biological signals that trigger hunger, understanding genetic influences that play a role in weight gain, and uncovering environmental and behavioral factors that influence obesity.

Science by the Numbers: Modeling Complex Biological Processes

computer microchip with binary code

Science is a process of trial and error. Most successful research publications are preceded by at least a few false starts and perhaps weeks or even months of tinkering to get experiments to work. For IRP senior investigator Carson Chow, Ph.D., this process of testing and throwing out one potential solution after another is an essential part of his research, so much so that he may go through thousands of iterations before arriving at one that works. However, rather than test each approach himself, he leverages the IRP’s considerable computing power to considerably accelerate the process of sorting the wheat from the chaff.

Tracing the Neural Circuitry of Appetite

Reblogged from the NIH Director's Blog. Originally posted by Dr. Francis Collins, NIH Director, on May 5, 2015.

If you’ve ever skipped meals for a whole day or gone on a strict, low-calorie diet, you know just how powerful the feeling of hunger can be. Your stomach may growl and rumble, but, ultimately, it’s your brain that signals when to start eating—and when to stop. So, learning more about the brain’s complex role in controlling appetite is crucial to efforts to develop better ways of helping the millions of Americans afflicted with obesity.