Is your Matcha lowering your iron levels?

The Effects of Tea and Coffee on Iron Absorption

If you’re someone who starts the day with coffee, sips matcha in the afternoon, or enjoys a cozy tea break, you’re not alone. For many women, these drinks feel like non-negotiables. But here’s something that doesn’t get talked about enough: coffee and certain teas may quietly lower your iron levels over time.

This doesn’t mean you need to give up your favorite brew, but it does mean timing and moderation matter, especially for women in their reproductive years.

Why Iron Matters Especially for Women

Iron helps your body make hemoglobin, the protein in red blood cells that carries oxygen throughout your body. When iron levels are low, you may feel:

• Fatigued or low energy

• Lightheaded

• Short of breath

• Foggy or less focused

Premenopausal women (roughly ages 24–46) are already at higher risk of low iron due to menstruation, pregnancy, and higher nutrient demands. Small daily habits can add up.

What the Research Found*

A large national health study looked at over 4,300 premenopausal women and examined how coffee and green tea intake related to two key markers of iron status:

• Hemoglobin (how well oxygen is carried)

• Ferritin (how much iron your body has stored)

Researchers accounted for factors like age, weight, diet, physical activity, smoking, alcohol intake, and daily iron intake, so the results weren’t just about coffee alone.

The key findings:

• Women who drank more coffee had lower ferritin levels

• Each additional cup of coffee per day was linked to a drop in iron storage

• Drinking more than two cups per day was associated with a meaningful reduction in ferritin levels

• The relationship showed a clear pattern: the more coffee consumed, the lower iron stores tended to be

In simple terms, regular coffee intake, especially multiple cups per day can interfere with how much iron your body keeps in reserve.

Why Does Coffee (and Tea) Do This?

Coffee and green tea contain natural compounds called polyphenols and tannins. These compounds can bind to iron in your digestive tract and make it harder for your body to absorb particularly non-heme iron, the type found in plant foods like beans, greens, and whole grains.

So even if you’re eating iron-rich foods, drinking coffee or tea too close to meals can reduce how much iron your body actually uses.

Should You Be Worried?

Not necessarily, but it’s worth being mindful if you:

• Feel chronically tired

• Have heavy or irregular menstrual cycles

• Follow a mostly plant-based diet

• Are pregnant or postpartum

• Have been told your iron is “borderline” or low

This research doesn’t say coffee is bad. It simply highlights that daily habits matter, and for some women, frequent coffee intake may contribute to low iron over time.

Simple Ways to Protect Your Iron (Without Giving Up Coffee or Tea)

Good news! You don’t have to choose between your iron and your latte.

Here’s what helps:

• Space coffee and tea away from meals (wait about 1–2 hours after eating)

• Pair iron-rich foods with vitamin C (think citrus, bell peppers, strawberries)

• Limit coffee and tea to 1–2 cups per day if iron is a concern

• If you take iron supplements, don’t take them with coffee or tea

  
  

The Bottom Line

For women in their reproductive years, drinking more than two cups of coffee per day may quietly lower iron stores over time. Awareness, not restriction is key. With smart timing and balance, you can enjoy your favorite drinks and support your long-term energy and wellness.

If you’re feeling persistently drained or unsure about your iron status, a simple blood test and a conversation with a healthcare provider can go a long way.

*Source: Lee, D., Jung, W., & Shin, D. W. (2023). Association of Coffee or Green Tea with Ferritin or Hemoglobin in Premenopausal Women. Korean journal of family medicine, 44(2), 87–94. https://doi.org/10.4082/kjfm.22.0133