Brazilian Coffee Chemistry: From Bean Composition to Health Implications

Brazil, the world's leading producer of raw coffee beans, with 70% being Arabica and the rest Canephora, offers a rich subject for scientific research. Beyond agricultural aspects, studies delve into the chemical composition of coffee beans and their potential applications. Carbohydrates are the most abundant chemical class, followed by lipids that form coffee oil, a source of triglycerides with antioxidant properties beneficial for cosmetics and enhancing beverage creaminess. Diterpenes, specifically cafestol and caveol, are also present, with cafestol known for its cholesterol-raising effects. However, the concentration of cafestol varies significantly depending on the brewing method. Unfiltered coffees like Turkish, boiled, and French press methods contain higher levels, while espresso has reduced amounts, and filtered coffee has very low concentrations that do not impact health. High roasting temperatures can alter these diterpenes, forming derivatives whose health effects are less understood. A research group at UFRJ's Chemistry Institute has developed methods to isolate pure cafestol and study its transformation, aiming to understand its role in human health. They are also producing roasted diterpene derivatives for biological testing to confirm their impact on cholesterol levels. Additionally, research explores utilizing defective coffee beans to produce oil and sugar-rich syrups, promoting a circular economy within the coffee industry. These studies aim to provide valuable insights into coffee's health benefits, grain quality, and sustainability.