Iron Supplements & Food: Understanding Incompatible Substances

Inhibition of iron absorption is the primary reason to avoid dairy products, as well as food and beverages containing caffeine. According to the Centers for Disease Control and Prevention, iron-deficient people are already at risk and should avoid tea, coffee, milk and other dairy products.

Effects

• A U.S. Department of Agriculture study found that the component casein (a protein containing phosphoric acid) in cow's milk inhibits iron absorption.

Identification

• Polyphenols are substances in caffeine, tea and coffee that interferes with iron absorption.

Considerations

• Insufficient iron absorption is also linked to the phytates found in whole grains, nuts and legumes. Excessive consumption of antacids interferes with the body's ability to metabolize iron.

Prevention/Solution

• Taking iron pills on an empty stomach will ensure optimal absorption, and consuming foods containing vitamin C may further increase absorption.

Causes

• Needing an iron supplement is a result of poor nutrition or an increased demand for the nutrient during pregnancy, rapid growth or blood loss.

Warning

• Inadequate levels of iron can lead to anemia, which requires treatment. Symptoms include fatigue, pale skin, unusual cravings, poor appetite, cold hands or feet, headaches and dizziness.