Are you feeling rundown—even after having some downtime over the holidays? Do your legs feel “heavy,” or are you feeling a bit out of breath? If so, you may be dealing with a very common mineral deficiency: iron. In the body, iron has the very important job of making hemoglobin. Without enough hemoglobin in the blood, your tissues don’t receive enough oxygen. And without oxygen, your muscles and tissues don’t work as well… which leads to the tiredness you’re feeling….