I've been reading up on half-lifes of some roids and, for example, I will most likely be doing a test cypionate cycle soon, since it's half life is of 12 days why not dose the injections like this
day 1---400 mg (assuming this is what you want)
day 13--200 mg (because 200 mg of the original is still there)
day 25--200 mg ...
and so on therefore keeping levels constant instead of injecting every week and then accumulating the amount of artificial testosterone in your body.
Posted by: Mudge
That is active half life, true half liife is closer to 5-6 days. There are blood level calculators out there if you want to get freaky, but I can't vouch for their accuracy and most likely there is no reason for you to over complicate things.