How should you take vitamins?

From your food: Eat a varied, balanced diet that contains whole grains, lots of fruits, lots of vegetables, and lean meats (including fish). If you eat well, most of your vitamin needs will be met by your food. The exception to this is vitamin d. D is hard to get in sufficient quantity from food, so it's best to take a daily supplement.

Vitamins: Best to take calcium or magnesium supplements at different time than other minerals. Taking magnesium or iron wi food helps prevent GI upset. Vit A, D, E, & K are absorbed better wi fatty foods. Vit A is better absorbed when combined wi Vit E. Vit C helps iron absorption. Taking Vit D wi dinner vs breakfast helps absorption. Avoid taking Vit D,E or K at the same time as other fat soluble vits.