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The Vital Role of Iron in Your Body: Functions, Absorption, and Deficiency Signs

The Vital Role of Iron in Your Body: Functions, Absorption, and Deficiency Signs

Women generally require more iron than men, especially if you exercise frequently, menstruate, are pregnant, or follow a vegetarian diet. Monitoring your iron intake is essential—here's why iron is crucial for your health.

What Does Iron Do in Your Body?

As a registered dietitian with years of experience helping clients optimize nutrition, I can confirm that iron is key to producing hemoglobin, a vital protein in red blood cells that transports oxygen throughout your body. Iron also supports energy production, which explains the profound fatigue often linked to iron deficiency.

Read also: 'You should eat these 10 iron-rich foods more often'

Heme Iron vs. Non-Heme Iron

Iron from food comes in two forms: About 90% is non-heme iron, found in both animal and plant products, while 10% is heme iron, exclusive to animal sources. Your body absorbs up to 25% of heme iron efficiently, compared to just 1-10% of non-heme iron. This is why incorporating meat can help meet your iron needs more effectively.

Iron-Rich Foods

Plant-based sources: Whole grains, soy products like tofu and tempeh, potatoes, legumes (especially peas and lentils), nuts, seeds, leafy green vegetables, herbs like oregano and basil, mustard seeds, seaweed, dried fruits, and apple syrup.

Animal sources: Red meat (particularly organ meats from beef and lamb), chicken, fish, shellfish, and eggs.

Iron Deficiency and Anemia

Your body adapts by absorbing more dietary iron when stores are low. However, severe deficiencies can lead to anemia, which may also stem from insufficient folic acid or vitamin B12.

Early Signs of Iron Deficiency

Symptoms often emerge before full-blown anemia develops. Watch for these common indicators:

  • Fatigue
  • Pale skin
  • Restless legs
  • Shortness of breath