i dont know, but since short /no ester use (tren ace or test suspension) is so common among "natural" athletes i would think there is a connection to the ester...
I can attest to the tren ace dissipating quickly... as I've done an injection of 100mg and roughly 14days later got paid a visit by DCI and gave a piss test that came back clean as a whistle. (later gotta felony thanks to 2 used syringes with a drop of tren ace in each and an empty 20ml vial with tren ace.. all tested positive)