 of the mineral, and this might cause toxicity. In other words, if I take, let's say I'm taking zinc for wound healing, or for hair growth, or something, or for blood sugar. So, if I take too much zinc, I guess it'd be tough to take too much zinc, but if I take too much zinc, so that can indeed be a problem. So you could be trying to do something good for yourself, but screwing up. Well, absolutely. With zinc, for example, zinc has an antagonistic effect on copper.