What is it about?
Participants given 3 different doses of tannins we did not find an impact on iron absorption. They also did not negatively impact indicators of iron status.
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Why is it important?
The general thinking is that tannin consumption negatively impact the ability to absorb iron and thus ultimately the body ability to store and utilize it. But we did not find that to be the case in this study.
Read the Original
This page is a summary of: Long-Term Dose-Response Condensed Tannin Supplementation Does Not Affect Iron Status or Bioavailability, Current Developments in Nutrition, September 2017, Oxford University Press (OUP),
DOI: 10.3945/cdn.117.001081.
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Resources
Salivary cystatin SN binds to phytic acid in vitro and is a predictor of non-heme iron bioavailability with phytic acid supplementation in a proof of concept pilot study
A similar study that supplemented with phytic acid.
The Impact of Tannin Consumption on Iron Bioavailability and Status: A Narrative Review
Review on the impact of tannin consumption on iron absorption and concentrations found in the body.
Salivary proline-rich protein may reduce tannin-iron chelation: a systematic narrative review
Systematic literature review on tannins and salivary proline-rich proteins.
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