Understanding the human body is a team effort. That's where the Yachtel group comes in.

Researchers at Yachtolt have been delving into the secrets of probiotics for 90 years.

Yacold also partners with nature portfolio to advance gut microbiome science through the global grants for gut health, an investigator-led research program.

To learn more about Yachtolt, visit yawcult.co.

.jp. That's y-A-K-U-L-T.C-O.J-P. When it comes to a guide for your gut, count on Yacult.

This is Scientific Americans' 60-second Science. I'm Karen Hopkins.

Few things are more satisfying than sleeping late on weekends. But though the extra zees may improve your mood, they do not appear to improve your health.

Because a new study shows that so-called recovery sleep cannot reset the body's metabolic clock

and may actually lead to some serious health issues.

Sleep loss can impact a range of physiological systems. It can increase our risk for cardiovascular

disease. It can cause weight gain. It can decrease insulin sensitivity, so increase risk of diabetes.

Christopher Deppner, an assistant professor in the Department of Integrative Physiology

at the University of Colorado Boulder.

And these can happen, depending on what you're looking at, this can happen as quick as just

one or two nights of not getting enough sleep.

A lot of us shut off the alarm on Saturday and Sunday, but we go right back to burning the candle at both ends once the work week begins.

So we were really interested in how this sort of cycle between insufficient sleep, weekend recovery sleep, insufficient sleep can impact your risk of obesity and metabolic disease.

Deppner and his colleagues invited volunteers to a nine-day snooze-a-thon.

One group was allowed to get a full-night sleep.

The next was kept to just five hours each night.

And the third group went back and forth, restricted to five hours of shut-eye during the work

week, allowed as much sleep as they wanted over the weekend, and then back to five hours

...