And don't trust anyone who says you can lose weight without exercising. Realize that vitamins don't give you energy. Vitamins and minerals make up the foods that give you energy, but by themselves, they won't do anything. But they're co-factors in the process, Kull said. Mega doses of vitamins don't give you extra benefit.
Vitamin D is extremely toxic if taken in large amounts.
Stick to the Recommended Daily Allowances, which are based on how much of that nutrient your body needs. Don't rely only on testimonials. That's not science, Kull said. You don't have to eat organic or specially prepared foods. Similarly, natural vitamins are not better than synthetic vitamins.