My doctor perscribes me Test E for lowTest levels. I get 1200mg a week. I do my own shots. The question is I can not tell the dirrerence in 1200 or 900mg. I am 40 years old 208 lbs, 6'1" and workout 4 days a week. I eat high protein foods and try to keep my diet in check. I have read several things about receptors and I am not sure if I am taking more test then I should to grow.