Iron deficiency is the most common nutritional deficiency and can cause a variety of symptoms including fatigue, pale skin, restless leg syndrome, hair loss, and shortness of breath. Iron is important for producing hemoglobin and transporting oxygen throughout the body. It also contributes to overall health, beauty, and wellbeing by maintaining healthy cells, skin, hair, nails, and energy levels. There are two types of iron - heme iron, which is more efficiently absorbed from meat, and non-heme iron from plants. New heme iron supplements provide benefits over traditional iron supplements as they are better tolerated with less stomach side effects and are more efficiently absorbed.