Caffeine is a plant toxin. It's a neurotoxin and an insecticide that was developed to fry the brains of insects trying to eat that plant. And so that's probably not what you want to put in your body.
Coffee also has 150,000 other chemicals besides caffeine.
Search Assistant acknowledges 1,000 chemicals but is unable to identify all 1,000.
Wikipedia identifies some of them, including the insecticides,
The chemical complexity of coffee is emerging, especially due to observed physiological effects which cannot be related only to the presence of caffeine. Moreover, coffee contains an exceptionally substantial amount of antioxidants such as chlorogenic acids, hydroxycinnamic acids, caffeine and Maillard reaction products, such as melanoidins.[3] Chemical groups, such as alkaloids and caffeoylquinic acids, are common insecticides; their effects on coffee quality and flavor have been investigated in most studies.[4] Although health effects are certainly a valid taxonomy category, less than 30 of the over 1,000 compounds have been subjected to juried, health-related research (e.g. official potential carcinogen classification — see furans, for example), so health categorization has been avoided.
So you might as well at least get rid of those if you want the caffeine. If all you want is the caffeine, then just get the caffeine. And so what I would suggest is if you guys did want to have caffeine, maybe ditch the coffee side of things. Start with the caffeine pill. Take like a NoDoz, or something like that . . . .
