no
primo acts at the anabolic receptor less than deca more than test. That's it. It preserves muscle in starvation better than others because of it's high anabolic activity, and more importanly, it's cross over into blocking glucocorticoid receptors which control catabolism. But anabolic increase rna transcription, forming new proteins, "getting big", but only if there is enough protein and calories for the task. Primo will preserve muscle better with starvation. Mediocre know-it-alls like pete "the cat" and b. roberts blur this distinction - it sounds good. It's ok, they're often wrong, like whether primo or eq is stronger, and whether or not eq converts to estrogen (both answers are known and both online profiles are wrong). Your first instinct was right, if it sounds too good to be true it probably is! Believe me, though, if you want to bulk, man-oh-man primo CAN (i repeat CAN) do the job. I'm doing it now!