Research details the importance of maintaining the body's rhythm for optimal health so NBC News medical contributor Dr. John ...

Discover how your body’s internal clock influences your weight and overall well-being — and how to get it back into sync.

Syncing your circadian rhythm to a natural light-dark cycle could improve your health and well-being. nambitomo/iStock via Getty Images Plus Anyone who has suffered from jet lag or struggled after ...

It's well-known that neural circuits help synchronize our biological clock with the day-night cycle. But just how exactly do ...

There are some economic reasons for permanent daylight saving time, but the health and safety reasons for permanent standard ...

We all have the same 24 hours in a day, right? Well not actually. Some people suffer from a rare, debilitating disorder that ...

New research suggests that the circadian system in people with obstructive sleep apnea may disrupt blood vessel function ...

1. Don't adjust your wake-up time straight after the time changes. After a few days to a week, your body will acclimate to the new time. Instead, consider taking a short 20-minute nap in the ...

The daily rhythm of genetic activity varies between individual cell types in ways that depend on their states of health, a ...