Iron is an integral part of many proteins and enzymes that maintain good health. In humans, iron is an essential component of proteins involved in oxygen transport. Maintaining healthy iron levels helps encourage oxygen delivery to cells, which in turn supports body energy and immune health. It is also essential for helping maintain cell growth and differentiation. But it?s also important to know how much iron you need, since excess amounts of iron can result in toxicity and even death. Iron protein succinylate is a highly absorbable form of iron and is easier on the stomach than other forms of iron.