(CNN) – A new study is linking the use of six muscle-building supplements to symptoms of body dysmorphia in teens. The study author found that substances like whey protein powder, creatine products ...

While protein powders can be a convenient way to increase protein intake, they are not mandatory for muscle growth.

There's even more evidence that creatine may be the best-value fitness supplement you can buy. Studies suggest it can help you build muscle, burn fat, boost performance, and even protect your brain.

Creatine is a popular workout supplement, and some people use it to support weight loss. Learn how this supplement ...

Muscle-building supplements are increasingly popular with teen boys and young men. New research suggests overuse of products ...