There are negative effects of having too much iron. Coffee and common herbal teas impair iron absorption, which may help explain some of their benefits.
For background on iron regulation, see my video Risk Associated with Iron Supplements ([ Ссылка ]).
What about the different types of iron found in food? Check out The Safety of Heme vs. Non-Heme Iron ([ Ссылка ]). I also talked about this in my series on plant-based meats. The information on iron starts with What About the Heme in Impossible Burgers? ([ Ссылка ]).
For those surprised to hear about coffee’s benefits, see, for example:
• Coffee and Cancer ([ Ссылка ])
• Preventing Liver Cancer with Coffee? ([ Ссылка ])
• Coffee and Artery Function ([ Ссылка ])
• Coffee and Mortality ([ Ссылка ])
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Thanks for watching. I hope you’ll join in the evidence-based nutrition revolution!
-Michael Greger, MD FACLM
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