(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 ...

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.

Primary care, family medicine, and mental health clinicians should ask every adolescent and young adult they care for if they take muscle-building supplements such as protein or creatine, according to ...

Changing your rep range and your workout intensity can help you build more muscle, says an exercise scientist with decades of ...