ความคิดเห็นที่ 21
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Liver provides the most concentrated amount of vitamin A of all food sources. It is considered an efficient aid in vitamin A deficiency. The current Recommended Dietary Allowance of vitamin A is 800-1,000 micrograms (mcg) for adults. A 3 1/2-ounce serving of beef liver provides 18,000 mcg of vitamin A. Babies and very young children often have diets already high in vitamin A and are at higher risk of vitamin A poisoning from frequent liver consumption.
Liver has long been a part of the treatment for pernicious anemia because it is a rich source of heme iron (the organic iron in animal foods). This type of iron is five times more easily absorbed than non-heme iron. Pork liver contains the highest amount of iron, at 34 mg per 4-ounce serving.
Liver is a good source of the mineral phosphorus. A diet which includes large quantities of liver also should include added calcium since high phosphorus intake can create a deficiency of calcium. One of the few natural sources of vitamin D, liver is also an excellent source of all the B vitamins (particularly B12), copper, vitamin C and trace minerals.
However, liver is also a concentrated source of cholesterol. Four ounces of beef liver contain about 400 milligrams (mg) of cholesterol, exceeding the recommended daily limit set by the American Heart Association by 33 percent.
For all the nutrients liver provides, and the amount of fat and cholesterol it contains, liver is a surprisingly low calorie food. Four ounces of raw chicken liver contains only 144 calories. Four ounces of beef contains only 182 calories. ^^"
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