I believe it wasn't to long ago that they came out with a study that said most vitamins, especially multi-vitamins do little if any good and that getting your vitamins from you diet as nature intended is the way to go.

Many supple mets tell you to take them after you eat a meal. The reason being that in the process of digesting you food, the vitamin has the chance to break down and get absorbed along with the nutrients in the food.

Nothing is perfect 100% in all cases. What works for one, might not for another. Keeping your doctor in the loop is a good idea as well as doing everything in moderation.