50mg of zinc per day is definitely a high dose, especially if you don't have low zinc, hashimoto's, or low testosterone. like norbert said, this kind of dose can easily throw off your copper levels over time, which can easily backfire.
i have hashimoto's myself and i'm currently on 25mg zinc with 1mg of copper. i'm considering increasing it a bit since i haven't felt much benefit yet. one side effect i've noticed, when i take zinc on an empty stomach, i get headaches, which i think is pretty common and known.
if you're planning to stay at 50mg, i'd really recommend switching to a supplement that also includes copper, just to stay balanced, and maybe get a mineral panel or blood test after a month, just to see where your levels are at
