Takže když není prokázána rakovina, tak je to něco správného, ale když se to prokáže, tak je to nemoc? TO asi ne. A navíc není pravda, že se to nemá žádné zlé účinky.
Excessive amounts of coffee can cause very unpleasant and even life-threatening adverse effects.[114] Coffee's adverse effects are generally more common when taken in excess. Many of coffee's health risks are due to its caffeine content and can therefore be avoided by drinking decaffeinated coffee.

Oily components called diterpenes are present in unfiltered coffee and coffee brewed using metal filters, but not in coffee brewed using paper filters.[129] The two diterpenes present in coffee, kahweol and cafestol, have been associated with increased risk of coronary heart disease via elevation of low-density lipoprotein (LDL) levels in blood.[130]