Don't believe it. It is a ANABOLIC Steroid. You have to increase your protein intake for every AAS in every cycle to take full advantage of the anabolic effects because AAS utilize the protein synthesis very efficiently.
Anavar (Oxandrolon) is a weak AS compared to many other well known ones. It won't give you huge muscle size but make you very strong. Plus it is one the safest roids to use with almost no serious side effects.