Cocoa flavanols are among the best-studied polyphenols there are — the 21,000-person COSMOS trial tied supplemented cocoa extract to a 27% drop in cardiovascular death. A daily square or two of 85%+ gets you real flavanols with little sugar. DRAFT ENTRY: the owner picks the actual bar before this goes live; alkalized (dutched) cocoa strips most flavanols, so the pick matters.

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