Graded against 173,636 supplements + 177 published clinical interactions, sourced from PubMed, FDA CAERS, openFDA, NIH DSLD
OPC
MODERATE EVIDENCESupplementLast updated
AVELOR SUMMARY
OPCs are condensed tannins found in grape seed, pine bark, and cocoa. Powerful antioxidants that strengthen capillary walls and improve endothelial function. and pine-bark-extract.md for the two primary OPC sources. The 'French Paradox' is partially OPC-mediated (red wine procyanidins).
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*Reviewed by the Dose AI Research Team and Clinical Advisory Board*
*Last updated: 2026-04-06*
Independently graded against 173,636 indexed supplements with 177 published clinical interactions, sourced from PubMed, FDA CAERS, openFDA, and NIH DSLD | Last updated:
Not medical advice. Based on published clinical research and systematic reviews.