Here's how muscle growth, or hypertrophy, works and four ways to optimize hypertrophy including nutrition and resistance ...

As every bodybuilder knows, a deep, restful sleep boosts levels of growth hormone to build strong muscle and bone and burn fat. And as every teenager should know, they won't reach their full height ...

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 ...