I've noticed lately that my libido drops when I take zinc. As we all know, zinc is essential in many enzyme reactions that contribute to the production of testosterone. Zinc deficiency is known to cause low testosterone, and low libido. I am not currently taking a multi.
When I was in my twenties, I used zinc for libido with great results. Now I'm forty, and when I take zinc at 50 mg per day, I notice my libido drops to shit after a few days of taking it. 2 to 3 days after I cease the zinc supplementation, my libido returns to normal.
Could it be that the zinc I'm using is the cheap, shitty zinc from the grocery store? Could it be that my zinc intake is already high, and an overdose is causing a paradoxical effect, or the fact that the incorrect ratio of copper and zinc in my system is off and causing a paradoxical effect?