I cannot attest to all of science, but anecdotally, that is wack bs. I am very sensitive to caffeine. Know how I know? I got them mixed up once and after 3 cups of black “decaf” (it was the caffeinated) I started low-key tweaking. Hot flashes, cold flashes, sweats, vision blurring. I can’t say all stuff is like that, but I did NOT mix up my caffeine and decaf like that again.