Injections of human growth hormone (HGH) can unfairly transform an Olympic also-ran into a gold medallist, an Australian study has confirmed. Research funded by the World Anti-Doping Agency has ...

During sleep, the brain produces growth hormone to help build muscle and bone and reduce fat. UC Berkeley research in mice reveals the brain circuits that regulate growth hormone release, along with a ...

Sleep is often treated as downtime, a passive break between the real business of being awake. But a new study has revealed that sleep is active, essential biology, showing how the brain uses the night ...

What Exactly Is Vitamin D? Despite its name, vitamin D isn't a vitamin—it's a hormone. Unlike traditional vitamins that we must obtain solely from food, our bodies can produce vitamin D naturally when ...