No, zinc may help to restore natty test levels back to normal if a deficiency is present (which can be common among athletes, however). It is a mineral, nothing more.
6-oxo is an aromtase inhibitor, which helps control estrogen levels by binding to the aromatase enzyme. No point in typing it all out here, look up 6-oxo on Ergopharm's web site and check out the mechanisms by which aromatase works, and how this would be surpressed when 6-oxo binds to it.