iron comes from iron ores in the world.
iron comes from iron ores in the world.
where does iron come from in the world?
iron ores
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the absorption of dietary iron is a variable and dynamic process. the amount of iron absorbed compared to the amount ingested is typically low, but may range from 5% to as much as 35% depending on circumstances and type of iron. the efficiency with which iron is absorbed varies depending on the source. generally the best-absorbed forms of iron come from animal products. 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. heme iron in animals is from blood and heme-containing proteins in meat and mitochondria, whereas in plants, heme iron is present in mitochondria in all cells that use oxygen for respiration.
human iron metabolism