Have you changed your diet to gain muscle?
Conditions... When you are building muscle you will find no advice on how and what to eat to change your diet. While your muscle building you need more protein. Protein is "any of a class of nitrogenous organic compounds that consist of large molecules composed of one or more long chains of amino acids and are an essential part of all living organisms, especially as structural components of body tissues such as muscle, hair, collagen, etc., and as enzymes and antibodies.
proteins collectively, especially as a dietary component.
"a diet high in protein"