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Medical Health Encyclopedia
Anemia - Treatment
Dietary Factors
Iron found in foods is either in the form of heme iron (attached to hemoglobin molecule) or non-heme iron:
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Heme Iron. Foods containing heme iron are the best sources for increasing or maintaining healthy iron levels. Such foods include (in decreasing order of iron-richness) clams, oysters, organ meats, beef, pork, poultry, and fish.
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Non-Heme Iron. Non-heme iron is less well-absorbed. About 60% of the iron in meat is non-heme (although meat itself helps absorb non-heme iron). Eggs, dairy products, and iron-containing vegetables have only the non-heme form. Such vegetable products include dried beans and peas, iron-fortified cereals, bread, and pasta products, dark green leafy vegetables (such as chard, spinach, mustard greens, and kale), dried fruits, nuts, and seeds.

The absorption of non-heme iron often depends on the food balances in meals. The following foods and cooking methods can enhance absorption of iron:
- Meat and fish not only contain heme iron -- the best form for maintaining stores -- but they also help absorb non-heme iron.
- Increasing intake of vitamin-C rich foods, such as orange juice, may enhance absorption of non-heme iron, although it is not clear if it improves iron stores in iron-deficient people. In any case, vitamin-C rich foods are healthy and include broccoli, cabbage, citrus fruits, melon, tomatoes, and strawberries.
- Riboflavin (vitamin B2) may help enhance the response of hemoglobin to iron. Food sources include dairy products, liver, and dried fortified cereals.
- Cooking methods can enhance iron stores. Cooking in cast iron pans and skillets can help increase the iron content of food.
- Vitamins B12 and folate are important for prevention of megaloblastic anemia and for good health in general. The only natural dietary sources of B12 are animal products, such as meats, dairy products, eggs, and fish (clams and oily fish are very high in B12). As is the case with other B vitamins, however, B12 is added to commercial dried cereals. The recommended daily allowance (RDA) for adults is 2.4 mcg a day. Deficiencies are rare in young people, although the elderly may have trouble absorbing natural vitamin B12 and require the more easily absorbed synthetic form of B12 from fortified foods or supplements.
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