We utilize the superior Albion Labs patented Ferrochel Iron chelate which research has demonstrated to be highly absorbed, well tolerated and non-constipating at recommended levels. Without enough iron, ATP (the fuel the body runs on) cannot be properly synthesized. As a result, some iron-deficient people become fatigued even when their hemoglobin levels are normal. Iron is essential for healthy blood, and an iron deficiency can eventually lead to a type of anaemia that makes it more difficult for blood to carry oxygen around the body.