Many people believe that building healthy, sustainable muscle mass is just a matter of taking sufficient quantities of protein – but the truth is rather more complicated.

While proteins play an inarguably important part in providing your body with the resources it needs to facilitate the proper growth and repair of muscular tissue, it is important to remember that the amino acids they provide are not enough to maintain the health of your muscles on their own.

Read on to learn about another key factor you've probably been overlooking.