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While this form of iron is also valuable, it is generally less easily absorbed by the body than heme iron. However, nonheme iron absorption can be enhanced by consuming it with vitamin C-rich ...
Nutritional causes are vitamin and mineral deficiencies and non-nutritional causes include infections. The number one cause of this type of anemia, however, is iron deficiency. [12] An insufficient intake of iron, Vitamin B12, and folic acid impairs the bone marrow function. The lack of iron within a person's body can also stem from ulcer bacteria.
“Research shows that calcium can inhibit absorption of heme iron which is the iron found mainly in meat, fish, and poultry as well as non-heme iron, the type of iron found in plants,” says ...
Since iron stores in the body are generally depleted, and there is a limit to what the body can process (about 2–6 mg/kg of body mass per day; i.e. for a 100 kg/220 lb man this is equal to a maximum dose of 200–600 mg/per day) without iron poisoning, this is a chronic therapy which may take 3–6 months.
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.
Since iron from plant-based foods isn’t absorbed as easily as iron from animals, vegetarians and vegans should aim for about 1.8 times the recommended daily allowance of iron compared to meat ...