HNF 150 Lecture Notes - Lecture 22: Molybdenum, Red Meat, Heme
Document Summary
Minerals that are needed in quantities less than 100 mg per day. Except for iron and iodine: discovered to be essential in last 50 years. Do not yet have clearly defined, essential physiological functions. Include: nickel, vanadium, boron, silicon, and arsenic: iron. Most abundant trace mineral in the body. Important component of hundreds of enzymes and other proteins. in the body: functions of iron. Oxygen transport: hemoglobin red blood cells, myoglobin muscle cells. Enzyme co-factor in the synthesis of neurotransmitters: brain development. Needed for production of immune cells: food sources, heme: Found only in animal flesh (meat, fish, poultry), mollusks: non-heme iron: Green leafy vegetables, seeds, beans, fortified cereals and grains. *animal flesh contains both heme and non-heme iron: two basic forms in nature. Heme iron- part of part of hemoglobin/myoglobin and the most bioavailable form: found only in animal flesh. Non-heme iron- type of iron found in plants and eggs: derived mostly from plants and eggs, iron absorption.
