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Can Herbal Tea Interfere With Iron Absorption?

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Updated January 07, 2015

herbal tea and iron absorption
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Question: Does Herbal Tea Interfere With Iron Absorption?

I've heard that drinking black tea with meals may have an effect on iron absorption. Does drinking herbal tea (chamomile, anise, green mint, etc.) with meals have the same effect?

Answer:

Black tea, green tea, and oolong tea naturally contain compounds called tannins. Tannins give tea their color and characteristic astringent taste.

Tannins can also inhibit the absorption of iron, however, especially iron from plant sources, such as peas, beans, nuts, leafy green vegetables, enriched pastas and breads, and fortified cereals. Plant sources of iron are called non-heme iron.

The absorption of iron from animal sources, such as red and dark meat, is generally not affected by tannins.

Herbal teas often contain tannins, so they could potentially reduce the absorption of non-heme iron if it's taken together with a meal. A cup of chamomile tea or peppermint tea contains far fewer tannins, however, than a cup of black tea.

Adding lemon, which is rich in vitamin C, may partially counteract this effect.

You may notice that the longer you leave a teabag in water, whether it's black tea or herbal tea, the more of an astringent, bitter taste it takes on due to the tannins. Being careful not to over-steep tea. Quickly removing the tea bag or leaves after steeping can reduce the amount of tannins in tea.

But keep in mind that unless a person has iron-deficiency anemia or does not eat meat, one cup of herbal tea should be acceptable.

Disclaimer: The information contained on this site is intended for educational purposes only and is not a substitute for advice, diagnosis or treatment by a licensed physician. It is not meant to cover all possible precautions, drug interactions, circumstances or adverse effects. You should seek prompt medical care for any health issues and consult your doctor before using alternative medicine or making a change to your regimen.

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