Cafestol and kahweol are diterpene molecules found in coffee. They are powerful agents that cause our bodies to increase the low density lipoproteins (LDL or "bad" cholesterol) in our blood. Cafestol and kahweol are removed from coffee by paper filters. Any coffee maker using a paper filter (such as the AeroPress coffee maker) removes virtually all of the cafestol and kahweol from the brew. We had this verified by an independent test lab for AeroPress brewed coffee.