Polyphenols · 06/08
Short answer
Polyphenols are natural compounds related to bitterness, pungency and resistance to oxidation. A single number does not determine flavour or the best choice for you.
50–800 mg/kg
Contextual range reported in a 2021 review
Check the analysis
Look for the test date, analytical method, laboratory and batch alongside the value.
Important note
50–800 mg/kg is not a universal minimum or maximum, nor a quality classification. Results from different methods may not be directly comparable. A number on the label is not independent verification.