The consumption of edible parts of a non-castrated pig , containing 19 - nortestosterone , has been shown to result in the excretion of 19 - norandrosterone in the following hours .
Athletes should prudently avoid meals composed of pig offal in the hours preceding doping tests .
The consumption of edible parts of a non-castrated pig , containing 19 - nortestosterone , has been shown to result in the excretion of 19 - norandrosterone in the following hours , so athletes should prudently avoid meals composed of pig offal in the hours preceding doping tests .