Enden said:It's possible, but unlikely. Estrogen builds up over time, and you would most likely experience other side effects before gynecomstia as well. If you got sore nipples after one week, your testosterone/estrogen ratio couldn't be ideal to begin with. Did you have any problems with this during puberty?
Enden said:Hi there. It's all in my thread; viewtopic.php?f=46&t=59803. Anyway, you shouldn't use zinc if you're not experiencing side effects. It may drive your estrogen level too low, which affects joints, brain function and sexual function in a negative way.