P-GH is amino based and can be used year round with benefits for those on AAS and off. It stimulates the pituitary gland to produce growth hormone and when taken causes vasodilation which is the temporary volumizing of the red blood cells. Each kit comes with a card that explains how to take the product, when and how much. The same information is on the site as well in the P-GH section. Ideally five days on and two days off .25cc at rise and rest, should the immediate side effect of vasodilation lessen or stop all together you can up the dose to .50cc in the morning. It is important that you realize this side effect every time you take the product because it is crucial in body fat reduction plus this helps lower cholesterol and increase libido. This is one of the most health beneficial supplements ever and it has amazing benefits to the bodybuilder. When you're on AAS it helps lessen the sides such as irritability and excess water retention while increasing libido..... Most guys wake up with morning wood after a few days of use. After about two weeks most realize BF reduction and increased vascularity, this of course is more noticeable to those with lower BF to begin with. Older users have reported lean tissue gain and BF reduction without even training, the realization of a dream for all bodybuilders come true. This is extremely rare and I'm sure due to change in diet and the bodies natural ability to heal and grow during rest from over training. None the less loss/gains were attributed to P-GH and one of these guys personal physician couldn't believe the speed of recovery after an injury. The others doctor couldn't believe how much his cholesterol had dropped. Younger users who compete on the national level in bodybuilding and fitness competitions say that they have never been able to get as hard, lean and vascular and we're talking from 20's to 30's. If anyone has any other questions please feel free to email us any time.