Chlorogenic Acid

Chlorogenic acids (CGAs) are important to coffee flavor, contributing to flavor when in the proper balance and level. They are a group of phenolic acids esterified to quinic acid, and account for up to 10% of the weight of green coffee. They are known to have antioxidant properties. Like all acids, its levels are reduced in roasting; darker roasts result in less acidity in the cup. Since it reduces to quinic acid in roasting, and quinic acid in high levels results in perceived bitterness and sourness, too much CGA is not desirable. Robusta coffees have roughly 25% more CGA than arabica!

Search Our Coffee Glossary