Does Tea Hinder Iron Absorption? Myths and Facts
Tea, an ancient drink with many benefits and rich in antioxidants, is appreciated for its flavors and health virtues. But did you know that it could also influence iron absorption? An essential element for the proper functioning of the body, it is important for our good health.
Should we therefore deprive ourselves of this delicious drink? The answer is no, but it is important to know the facts and recommendations, and to adopt a few simple gestures to minimize its impact on iron assimilation. Our study and details in this article!
Iron, a vital nutrient
Iron is a mineral present in small quantities in our body (around 3 to 5 grams), but it plays a crucial role in our health.
It is essential for:
- Oxygen transport: It is a main component of hemoglobin, a protein found in red blood cells that transports oxygen from the lungs to tissues.
- Oxygen storage: Present in myoglobin, a muscle protein that stores oxygen.
- Enzyme function: it is a cofactor for many enzymes involved in various metabolic processes.
Two types of dietary iron
It comes in two forms:
- Heme iron: Found in animal-based foods such as meat, fish, seafood, and offal. It is well assimilated by the body (approximately 25%) and its absorption is not influenced by other foods.
- Non-heme iron: Found in plant-based foods such as legumes, cereals, vegetables, oilseeds, and tofu. It is less well absorbed (approximately 5 to 10%) than the former, and its assimilation depends on the meal composition.
How to influence its assimilation by the body?
Certain substances can promote it
- Vitamin C: Vitamin C, found in citrus fruits, peppers, kiwis, and other fruits and vegetables
- Organic acids: Organic acids found in tomatoes, lemon, and vinegar
Other substances can inhibit it
- Phytates: Phytates found in whole grains and legumes
- Polyphenols: Polyphenols found in tea, coffee, and chocolate
Tea and tannins: What's the risk?
Tea, whether black, green, or white, contains tannins. These natural compounds have the ability to bind to non-heme iron, of plant origin, and limit its assimilation.
Research studies have shown that caffeine and theine, present in tea and coffee, can also play an important role in your body.
Black tea and green tea, which are richer in tannins than white tea (higher theine content), have a more pronounced effect.
Matcha tea and Bancha tea, on the other hand, are significant sources of iron. A cup of Bancha tea, rich in minerals and trace elements, contains approximately 38mg/100g, making it one of the richest iron foods in the world. A cup of matcha tea, meanwhile, contains between 10 and 17mg/100g.
Tips to minimize the impact of tea on iron absorption
- Limit infusion time: a shorter infusion limits the extraction of tannins.
- Do not consume tea that is too hot: an infusion water temperature of 60°C is ideal. Also, prefer filtered water.
If you suffer from iron deficiency
- Avoid drinking tea or coffee within 2 hours before or after a meal rich in non-heme iron.
- Opt for foods rich in heme iron, which are better absorbed by the body, such as red meat, poultry, and fish.
- Supplement your diet with vitamin C, which promotes iron absorption, such as citrus fruits, kiwi, red pepper, or broccoli.
- Choose teas lower in tannins: prefer white tea and green tea over black tea.
If you do not have a deficiency
You can enjoy your coffee or tea without fear, even at the end of a meal. Make sure to balance and diversify your diet daily.
Tips to boost assimilation
Add a squeeze of lemon juice to your lentil or spinach dishes.
Enjoy a fruit rich in vitamin C for dessert.
Avoid drinking coffee or tea at the same time as your iron-rich meals.
Tea should not be banned in cases of deficiency, or chronic illnesses; you just need to follow a few simple tips to enjoy its benefits without affecting the absorption of this essential nutrient.
Also consider the benefits of tea and antioxidants for your health!
Tea leaves are packed with antioxidants, which have beneficial health effects, particularly by contributing to the prevention of cancer and certain diseases. A beneficial plant not to be excluded.
Tea can also have a positive effect on sleep, by promoting relaxation and reducing stress.
It is important to choose quality plants and tea leaves, and to consume them in moderation, in order to fully enjoy their properties and avoid potential risks associated with excessive consumption.
Tips for an iron-rich diet
To meet your needs, it is important to consume a wide variety of products in a balanced and rich way. Here are some tips:
- Include heme iron-rich foods in your diet, such as red meat, chicken, fish, seafood, and offal.
- Combine non-heme iron-rich foods with sources of vitamin C to improve iron absorption.
- Limit the consumption of phytates and polyphenols during meals that do not contain iron.
In case of a deficiency, consult a doctor for personalized advice.
Our opinion
Tea and coffee are delicious and popular beverages, but it's important to understand their impact, especially in cases of deficiency. Our opinion is that tea and coffee should not be banned, but simply consumed in moderation and with awareness.
Conclusion
It is important to find a balance between the pleasure of enjoying your favorite drink and maintaining good health all year round! When in doubt, do not hesitate to consult a healthcare professional if you have any questions or are suffering from a deficiency.
By following our simple tips shared in this article, you can fully enjoy your favorite drinks without affecting iron absorption!
To go further, our references and studies:
- Hallberg L, Björn-Rasmussen E, Lönnerdal B. Iron absorption from breakfast cereals. Am J Clin Nutr. 1986;43(6):707-14.
- Cook JD, Monsen ER, Arredondo BM. Food iron absorption in man. Am J Clin Nutr. 1973;26(1):861-72.
- Hurrell RF, Reddy MB, Cook JD. Ferrous iron absorption from vegetables: the effects of various other foods, Cancer. Br J Nutr. 1990;63(2):249-58.
- Schlemmer U, Frølich W, Prieto RM, et al. Phytate in foods and its effect on mineral bioavailability. J Agric Food Chem. 2009;57(21):10302-10.
- Reddy MB, Hurrell RF. Effect of tea on iron absorption in man. Br J Nutr. 1987;58(2):267-72.