Coffee polyphenols
Family of antioxidant compounds including chlorogenic acids (main), caffeic and quinic acids. A 200ml coffee provides 200-550mg of chlorogenic acids. Coffee polyphenols are associated with reduced risk of type 2 diabetes, liver disease and Parkinson's in epidemiological studies.
Background & Context
Coffee is one of the richest dietary sources of polyphenols — bioactive plant compounds with antioxidant properties. The dominant polyphenols in coffee are chlorogenic acids (CGAs), a family of esters formed between quinic acid and various hydroxycinnamic acids (caffeic, ferulic, p-coumaric). A single espresso contains 70–200mg of CGAs; a 200ml filter coffee 250–550mg — making coffee the primary source of polyphenol intake for habitual coffee drinkers in European populations, often exceeding fruit and vegetable contributions. Roasting degrades CGAs: light roasts retain 60–80% of green coffee CGA content while dark roasts may retain only 20–30%. CGAs also have sensory significance — they are precursors to perceived acidity and, when degraded, contribute to the bitterness and astringency of dark roast profiles. Epidemiological studies (including the European Prospective Investigation into Cancer and Nutrition, EPIC) associate regular coffee consumption with reduced risk of Type 2 diabetes, Parkinson's disease, and liver fibrosis — effects partly attributed to CGAs.
Practical Use
For coffee buyers and consumers, polyphenol content is an emerging quality marker beyond sensory evaluation. Light-roasted specialty coffees — often positioned for flavour — also deliver the highest polyphenol loads. Cold brew produces less CGA extraction than hot methods at comparable concentrations, due to cold water's lower solubility of these compounds. For health-conscious café menus, filter coffee (light roast, 200ml serve) delivers the highest per-cup polyphenol dose with lower caffeine than espresso-based drinks. Decaffeinated specialty coffee retains most of its polyphenol content, making it relevant for caffeine-sensitive customers seeking health benefits.
Related Terms
Related terms: Chlorogenic acid, Light roast, Caffeine, Cold brew, Roasting.