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All trenbolone esters yield trenbolone, all testosterone esters yield testosterone,.. etc. What make a difference is attached ester. Now esters create a depot on the site of administration, (thus some injectable steroids have "depot" on their names) on the site of administration, and from within the muscles the hormone is released in sustained manner.
The role of esters is basically to make the synthetic hormones to resist immediate metabolism. Because of esters, the hormones are released steadily to prevent fluctuation in blood levels. The rate at which the hormones are released depends on the weight and length of the esters; some may take days, while some may take weeks. The longer and the heavier the ester attached, the longer the active life of the steroid.
The role of esters is basically to make the synthetic hormones to resist immediate metabolism. Because of esters, the hormones are released steadily to prevent fluctuation in blood levels. The rate at which the hormones are released depends on the weight and length of the esters; some may take days, while some may take weeks. The longer and the heavier the ester attached, the longer the active life of the steroid.