The Coffee Deception: 13 Little Known Facts About Coffee - Humans Be Free
You're not going to like this one bit: you've been lied about the health benefits of coffee!1. Caffeine is an alkaloid that the coffee plant uses to kill bugs, which eat its' seeds.The coffee plant also uses caffeine in the coffee pods to kill surrounding ...
i think fight or flight is mostly related to adrenaline release.
I can't tolerate much caffeine; it gives me palpitations and I feel ill. So I drink mostly decaf coffee. Strangely, I drink a boat load of cacao (pure cocoa) and it rarely gives me palpitations.
From Wiki "More specifically, the adrenal medulla produces a hormonal cascade that results in the secretion of catecholamines, especially norepinephrine and epinephrine.[5] The hormones estrogen, testosterone, and cortisol, as well as the neurotransmitters dopamine and serotonin, also affect how organisms react to stress.[6] The hormone osteocalcin might also play a part.[7][8]"
Both Adrenaline and Cortisol come into play. However it seems Adrenaline is the trigger for Cortisol. So both are correct, but Cortisol may have more direct impact on the Response, but it couldn't happen without the adrenaline.