My apologies if this has already been done (I didn't see it anywhere), but I thought it might be useful for members to see graphically what the concept of half-life actually means. Testosterone esthers for example, are actively released into the system over a certain period (for testosterone enanthate this is around two weeks), but the release rate is uneven, with a big spike up front. The release rate is dependent upon the concentration of the substance, and that concentration steadily declines. Here is a graph that shows the rate, and remaining dosage over time.
This should give a good idea of why there is an initial kick on the first and second days, and then a more stable release after that. The first graph shows the proportion of dose that is left in the body over about a three week period of time for testosterone enanthate (which has the longest half-life on commonly used compounds ... you can mentally adjust the x-axis of this graph for other compounds). The second shows for a 500mg initial dose, what will be left after a certain number of days.
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