Whole C Reset: Dr. Dean, Should I Supplement Vitamin C?

Unless you live in a remote community, untouched by the problems of modern farming, it’s highly unlikely your local food supply will provide you with enough vitamin C. Even if you were to focus on eating foods with a high concentration of vitamin C, you would only end up denying yourself other nutrients or suffering indigestion (from overeating). And, if you try to get all your vitamin C from fruit, you may end up getting too much fructose-sugar in your diet.

I find most people need to supplement with an additional 250–500mg of vitamin C a day — in addition to a daily diet that includes fruits and vegetables.