Follow logic and reason,
a signal and information can be sent to the receptive cells, it tells it what to do.
The adaptogens in the ginseng field instructs the body,
It tells it to do different things and act in certain ways.
Maca etc, are raw materials, its a very physical thing your body digests and uses to build and repair other things.
Medicinal chemicals that instruct, yes we can do this.
Proteins, no, but it can shifted around in your body, break down some muscle etc etc, to produce the effects, (and maca etc simulant) but this costs your own personal body resources.