Iron is essential for oxygen to be transported by the blood throughout the body, for oxygen to be used by cells, for synthesis of some hormones and connective tissue, and for production of energy. A deficiency can lead to anemia, fatigue, depression, learning problems, and poor immunity. Do you know where to get it, and how much you need? Find out by taking our quiz.
Looking to start a supplement plan and aren't sure which nutrients are most important to take? Start with the essentials-four vital nutrients everyone needs 2014 Buyer's Guide to Essential Supplements. The Egyptian pyramids have lasted for more than 4,000 years because of one thing-a solid foundation.