Can 500Mg of vitamin C cause eczema?

There is no evidence to suggest that taking 500mg of vitamin C can directly cause eczema or make it worse. Vitamin C, in general, supports skin health as a powerful antioxidant, but its effect on eczema specifically has not been extensively studied. If you have eczema and are concerned about your diet, it's always a good idea to consult with a healthcare professional, as individual cases may vary.