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Why do I need Iron?
Iron is an essential mineral for humans because it is part of blood cells. About
30% of the iron in the human body is in storage to be readily available to
replace any that is lost. Iron is essential to the formation of hemoglobin and
myoglobin, which carry oxygen in the blood and muscles. It also makes up part of
many proteins and enzymes in the body. Without enough of it, you'll feel weak
and tired -- symptoms of a condition called iron-deficiency anemia.
Which foods are good sources of iron?
There are two forms of iron, haem-iron and non-haem iron. Haem iron is better
absorbed than non-haem iron. Foods rich in heam-iron are liver, meat, poultry
and fish. They are not only sources of readily available iron but they also
promote the absorption of non-heam iron in plant foods eaten at the same time.
The iron content of milk is low in all mammalian species. Iron content of breast
milk averages less than .2mg/dl, and it is well utilized.
Foods containing non-heam iron are those of vegetable origin, e.g. cereals,
green leafy vegetables, legumes, nuts, oilseeds, jaggery and dried fruits. They
are important sources of iron in the diets of a large majority of people. The
bioavaillability of non-heam iron is poor owing to the presence of phytates,
oxalates, carbonates, phosphates and dietary fibre, which interfere with iron
absorption. Other foods, which inhibit iron absorption, are milk, eggs and tea.
Should I take a supplement?
It's a tricky question. Some people can definitely benefit from supplements.
According to the Centers for Disease Control, 12 percent of 12- to 49-year-olds
are iron deficient. On the other hand, an estimated 10 percent of Americans
carry a gene that causes them to absorb 50 percent more iron than normal. Taking
iron supplements can push their bodies into full-blown iron overload, which can
lead to heart and liver damage in extreme cases. A standard blood test will not
reveal this condition and you can have it even if you're iron deficient. Before
taking any iron supplements, ask your doctor if you should take a transferrin
saturation test.
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