There are three pillars to the Atkins Nutritional Approach: food, exercise, and supplements. Last month, I shared with you one of the supplements I take every day: Clean Nutraceuticals Q-Defend Immune Boost. The foundation of an effective nutritional supplement strategy is a solid multivitamin. I take GNC Mega Men® Energy & Metabolism Multivitamin every day because of the numerous benefits it provides. Read on for more details about this multivitamin.