I do take vitamins, but nothing beats fresh and healthy food along with a little bit of exercise. Here's what I take so far:

1. Healthy food (as much as possible, stay away from fried food)
2. In every meal that I eat, I always include fruits and vegetable and they take up about 2/3 of my meal.
3. Sodium Ascorbate + Zinc vitamin (I take ascorbate as opposed to ascorbic acid as I am acidic)