Research study was done on why alchoholics, and coke addicts tended to have feminine features. What it concluded was that zinc depletion caused naturally occuring test to aromatize at a greater rate, and at lower levels. No studies have been done on exogeneous test, and the effects of excess zinc amounts on aromatization!
I have used zinc to calm itchy nips temporarily, until my nolva arrived and it worked for me, but this is in no wat scientific proof, or am I suggesting that zinc is an anti-E!