with methylated orals, that is true. i wasn't aware that (for example), 1-ad et al were hepatotoxic, but i could be wrong.
also, most conventional PH cycles use no ester PH's which, unlike your deca/test type cycles, kick in much quicker, obviously.
what is the reason for the lack of effectiveness (alleged) after 4-8 weeks? is it an enzymatic limitation?