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The body mainly uses iron to create a protein found in red blood cells called hemoglobin, which is tasked with carrying oxygen from the lungs to other areas of the body. Additionally, iron helps ...
“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 ...
The same can occur with elements in food, such as calcium, which impacts both heme and non-heme iron absorption. [39] Absorption of iron is better at a low pH (i.e. an acidic environment), and absorption is decreased if there is a simultaneous intake of antacids. Many other substances decrease the rate of non-heme iron absorption.
“Products that contain calcium like dairy, yogurt, cheese, and fortified products decrease iron absorption.” Additionally, Castelli says that a high intake of eggs, coffee, and tea may also ...
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.
Iron malabsorption is a less common cause of iron-deficiency anemia, but many gastrointestinal disorders can reduce the body's ability to absorb iron. [39] There are different mechanisms that may be present. In coeliac disease, abnormal changes in the structure of the duodenum can decrease iron absorption. [40]
[11] [12] Foods high in calcium eaten simultaneously with foods containing iron can decrease the absorption of iron via an unclear mechanism involving iron transport protein hDMT1, which calcium can inhibit. [13] Avidin is an antinutrient found in active form in raw egg whites.
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 ...
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