CGA
CGA (chlorogenic acid) is a natural phenolic compound found abundantly in plants, especially green coffee beans, making up 8–10% of their dry weight.
In the specialty coffee world, CGAs contribute to the characteristic bitterness and acidity, and influence the final flavor after roasting. The CGA content of green coffee beans can influence the quality and flavor of the roasted coffee, and different processing methods can also affect this content. Additionally, CGAs have been linked to a number of health benefits, including antioxidant, anti-inflammatory, and disease-reducing properties, although some people may experience side effects such as stomach upset.”
