Caffeine is, originally, a pesticide.
That’s our best conclusion, at least. It matches all the criteria. We know it’s a bitter-tasting chemical concentrated in the bodies and leaves of a select few plants. We know that when insects and small animals consume caffeine, it overloads their nervous and digestive systems – severely impacting memory, motor functioning, and gut enzymes. We know that it is fatally toxic to many animals, even in relatively small doses compared to their body weight. And we can observe that this relationship existed long, long before humans did, as a means of self-preservation for the plant.
But interestingly enough: the only animals that are not negatively affected by caffeine? Pollinators.
While caffeine kills many insects outright, it robustly improves bees’ memory and motor functions. And, of course, humans, too. But it seems that the two animals most responsible for the proliferation of these unique plants are, in a way, rewarded for their efforts to continue the species. When the bees go for pollen, they quickly remember the coffee plants and return frequently. The plant didn’t just evolve an ability to repel predators – it evolved an ability to attract dedicated partners. That’s uncommon in nature, to say the least.
Our brains and nervous systems are so complex – so rich in chemical receptors – we can enjoy as an afternoon pick-me-up, that which is a lethal dose of speed for most of the animal kingdom. To think that this chemical, which existed only as a poison for so much of its time on earth, was directly responsible for the flourishing of civilization and thought? It boggles my mind.
And it’s only in light of this fundamental truth about caffeine that I can genuinely appreciate it. Too little, and I miss out on the remarkable ability of the human brain to turn poison into potential. Too much, and it becomes poison, once again.
It is a biological privilege to put this molecule to use, to experience the sharpening of the senses and memory brought on by the ingestion of caffeine. And it is a perversion to overuse this privilege – proven true by the gradual slipping away and diminishing marginal returns of these positive effects. Ultimately, we are punished with addiction and anxiety for our overindulgence in this magic molecule and forced to reset.
Moral of the story? Respect the plant. Respect the brew. Respect yourself.
