the way it's understood in medical science, is that it's hacked. Ie, they're trying to control and ameliorate processes. But the deeper understanding of biochemistry is that it's the effect and byproduct of the result of mental processes and emotions. Things literally taking form as a result of where our state of mind is.
Adrenalin is the simplest example. Of when we get amped up in a situation.
It's a principle, in other words, to be understood. And once it's understood, there's a much greater 'ease' around it. Or at least for me :)