How Safe Is Tylenol Really? The Answer Is Not As Simple As You May Think Patient Worthy Tylenol and glutathione, actually explainedhere's the bullet points: * Lots of concern raised on social media re: glutathione depletion and acetaminophen use * Glutathione is used in the metabolism Yes there is good evidence that acetaminophen (the active ingredient in Tylenol) can deplete glutathione under certain conditions. But whether that matters depends on dose, duration, and individual factors. Tylenol and Glutathione: A Closer Look At Their Relationship