actually, I have heard that oral primo acetate absorption is about 40%, which is going to be better than topical. As far as making an inj of the acetate I would say no, problems with crashing and have heard of major injection pain, this is a big reason you dont see inj primo acetate very often. But definitely most efficient and cost efficient is inj primo enanthate, I would say go that route, if the acetate powder is all you have maybe try both, but I would just eat it.