Unexplained muscle pain in the arms and legs may be the result of benign issues. Or it may point to a more serious underlying condition, such as fibromyalgia, infection, or thyroid issues.

Figure 1: Molecular characterization of the muscle-G4KO mice. Figure 2: Glucose uptake is reduced in muscle but is increased in liver in muscle-G4KO mice in vivo. Muscle-G4KO mice show fasting ...

Supplements for muscle growth (often called "ergogenic aids") may be used to help you "bulk up," improve athletic performance, or minimize aging-related muscle loss. Some supplements, like collagen, ...