Coffee is a beverage made from coffee beans and water. Coffee beans contain more than 100 chemicals, including caffeine, tannin, thiamin, xanthine, spermidine, guaiacol, citric acid, and chlorogenic acid
. The chemical composition of coffee beans is quite complex, and carbohydrates account for the most components
. The quality of water used to brew coffee is also important, as it can affect the taste of the coffee
. There are no positive or negative details provided in the search results. A reference material for food additives and ingredients in coffee (ground) is available for purchase
