I dug up some info, studies show mg per mg primo is only 88% anabolic as testosterone and 44%-57% as androgenic. Sust will yeild more bang per buck, real world results I think primo is even weaker probably because its less of a androgen? Basically its a girls drug. The only thing I would concider using it again for would be cutting, but id still rather use test, tren, winny for that.