diet

IRP Interns Shine at Summer Poster Day

NIH summer intern Ishu Sivakumar at Summer Poster Day

Upon entering the sunny foyer of the NIH’s Natcher Conference Center last Thursday, I was immediately struck by a burst of loud, excited chatter. As it always is on NIH’s annual Summer Poster Day, the building was filled with hundreds of high school and college students and the scientists, families, and friends who had turned out to see what these young men and women had spent the summer doing.

Intermittent Fasting Boosts Endurance in Mouse Marathoners

runner tying his shoe

Food companies have long marketed carbohydrate-rich drinks and energy bars to athletes with the message that the energy those snacks provide is key to lifting heavier and running farther. A new mouse study by IRP researchers, however, suggests that skipping a meal (or several) might be far more effective for increasing athletic prowess1.

Unlike modern Americans used to three square meals a day, our ancient ancestors couldn’t exactly throw a TV dinner in the microwave whenever they felt a bit peckish. As a result, they probably found themselves hunting wooly mammoths and fending off saber-toothed tigers on an empty stomach.

“From an evolutionary perspective, animals in the wild – particularly predators – need to be able to function at a high level when they’re in a food-deprived state,” says IRP Senior Investigator Mark P. Mattson, Ph.D., the study’s senior author. “Individuals who were able to perform at a high level in a fasted state had a survival advantage.”

Gut Bugs May Convert High-Fat Fare into Cancer Risk

cartoon image of the gut microbiome showing microbes in the digestive tract

Researchers have a long history of fattening up mice to gain insight into the causes and consequences of weight gain in the human body. In one of the more recent studies of this kind, a team of IRP researchers found that that a high-fat diet consistently altered the collection of microbes residing in mice’s digestive tracts and that this diet-microbe combination might pre-dispose the mice – and, potentially, obese humans – to colon cancer by triggering certain changes in how genes behave.

Muscle Enzyme Explains Weight Gain in Middle Age

Reblogged from The NIH Director’s Blog.

using a weight scale

The struggle to maintain a healthy weight is a lifelong challenge for many of us. In fact, the average American packs on an extra 30 pounds from early adulthood to age 50. What’s responsible for this tendency toward middle-age spread? For most of us, too many calories and too little exercise definitely play a role. But now comes word that another reason may lie in a strong—and previously unknown—biochemical mechanism related to the normal aging process.

Yasmine Belkaid Wins Sanofi–Institut Pasteur 2016 Award

Yasmine Belkaid

Yasmine Belkaid, chief of the Mucosal Immunology Section in the NIAID Laboratory of Parasitic Diseases, has won the Sanofi–Institut Pasteur 2016 International Mid-Career Award for “outstanding research in the life sciences…contributing to progress in global public health,” announced on December 13, 2016 in Paris.

Early Women Scientists of NIH, Part 2

Margaret Kelly, NCI NIH

Like many in the second wave of women scientists at the National Institutes of Health, Dr. Margaret Kelly began as a technician and got her PhD while she was working. Kelly focused on what caused cancer and what drugs could be used to fight it.

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.

Why Study Vitamin A Deficiency?

Widely acknowledged as a key to overall health, the food we eat affects our bodies in ways that are not always clear, all the way down to the molecular level.