“If science shows we are composed of trillions of cells and no ‘magic ingredients’ then…”
The thought is blind to the fact that if there are such ingredients then they are ipso facto invisible to scientific tools. Your first-person subjective experience, for instance, is invisible to science. It can only be accessed by asking you to tell.
Physicalism, as an attempt to explain all of reality, has a selective vision problem: it rules out anything it can't see.