Cafestol and kahweol concentrations in workplace machine coffee compared with conventional brewing methods
Erik Orrje, Rikard Fristedt, Fredrik Rosqvist, Rikard Landberg, David Iggman
Nutrition Metabolism and Cardiovascular Diseases
Abstract
BACKGROUND AND AIMS: Unfiltered coffee contains high concentrations of cholesterol-raising diterpenes. We aimed to measure the levels of diterpenes in machine coffee. METHODS AND RESULTS: Coffee samples were collected from Swedish workplaces and compared with home-made coffee brews. Concentrations of cafestol and kahweol were measured by liquid chromatography-mass spectrometry. The median (range) cafestol and kahweol concentrations were 176 (24-444) mg/L and 142 (18-434) mg/L for brewing machines (n = 11), 8 (2-343) mg/L and 7 (2-288) mg/L for liquid-model machines (n = 3), and 12 (4-24) mg/L and 8 (3-19) mg/l for home-brewed, paper-filtered coffees (n = 5). Boiled coffee had high concentrations of cafestol and kahweol, 939 mg/L and 678 mg/L, but having it poured through a fabric filter re