@NathanG - I don’t know the specific Zeaxanthin vitamin supplement that you’re referring to so I can’t say for sure. In general supplements do not reverse diseases.
I think the packaging on the supplement makes clear that it won’t do that. However, as you age I think you should start taking vitamin supplements that have antioxidants for your heart health and of course anything related to eyesight and mental acuity. Prevention is the best cure in these matters in my opinion.