Just looked at my Nature Made Simple book and was just having a bit of fun looking at the symptoms of various Vitamins, etc. Did you know that if you don't take enough Zinc that you could have a couple of these symtoms? Zinc is a Mineral. Without enough Zinc you have delayed wound healing, delayed sexual response, fatique, and much more! It's great for carbohydrate digestion! Available at Amazon and Barnes & Nobles.