my advice to you would be, learn the half lifes of the compounds your running and it's simple as that... once you understand the half life then you'll understand how long the compound remain active in your body before breaking down and eventully expunged from your body.... every time you use that compound the half life returns to 100% no matter how much you use, you can never surpass the 100% mark.... Also of importance here is the fact that the more compounds you take the greater the concentration in your blood becomes, until you achieve full blood serum saturation. Some people believe achieving full saturation somehow alters the half-life principle, but it doesnt. Saturation has to do with optimizing the effects you receive from a compound over time, but it still succumbs to the principle of half-life because even though you can have more of drug in your system (amount-wise), you can never exceed the maximum of 100%. Consequently, whenever you reach the hundred percent mark be it the first drug administration or after taking it for several weeks, months or years once the first half-life expires the drug amount is necessarily reduced to 50%.