Zinc makes me naseous but ive heard it helps vision is this true and why does it make me sick?

Yes, if you take zinc on an empty stomach you will feel sick. It is best to take this mineral with food. And yes to your second question, Zinc in the right dosage has had several studies show an increase in ones vision. I found an article that relates to this. Please click on the ZINC link below.

I hope this answers your questions.