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Steak is also a good source of vitamin B12, ... because animal sources of iron have what's known as heme iron, which is absorbed more abundantly and easily in humans than iron found in plant-based ...
Ascorbic acid, vitamin C, increases the absorption of non-heme sources of iron. [46] Heme iron polypeptide (HIP) (e.g. Proferrin ES and Proferrin Forte) can be used when regular iron supplements such as ferrous sulfate or ferrous fumarate are not tolerated or absorbed.
The heme iron serves as a source or sink of electrons during electron transfer or redox chemistry. In peroxidase reactions, the porphyrin molecule also serves as an electron source, being able to delocalize radical electrons in the conjugated ring. In the transportation or detection of diatomic gases, the gas binds to the heme iron.
Absorption of dietary iron in iron salt form (as in most supplements) varies somewhat according to the body's need for iron, and is usually between 10% and 20% of iron intake. Absorption of iron from animal products, and some plant products, is in the form of heme iron, and is more efficient, allowing absorption of from 15% to 35% of intake.
Iron is a mineral that is crucial for optimal health and well-being. Found naturally in many foods and dietary supplements, it is a key component of hemoglobin, the part of red blood cells ...
Researchers found that those who consumed the highest amount of heme iron, which is found in red meat and animal products, had a 26% higher risk of developing type 2 diabetes.