In general your body can tolerate more vitamins and minerals then it needs. While humans require a supply of ascorbic acid and can’t synthesize it, meaning they will die without it, they only need a relatively small amount and can eat foods very rich in it without health problems, getting more then ten times the requirement won’t bother a human.
A lot of vitamins and trace minerals are like this. Unless you make some very strange and unwise dietary choices you will never need to worry about too much zinc.
Edit: Supplements can easily be unwise and dangerous diet choices. Make sure to research any vitamins you take to make sure they aren’t going to have bad effects with your diet and body’s requirements.
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