Dr. Laura E. Riley joined @GoodMorningAmerica recently to clear up some lingering confusion about Tylenol (acetaminophen) use during pregnancy. A new study from the University of London found that acetaminophen is safe Did you know acetaminophen lowers glutathione levels? Myth busting, Acetaminophen version. "Avoid Acetaminophen (Tylenol) because it causes glutathione depletion". Truth?? As a pediatrician and ER doctor and as moms we're often asked about this. And we understand why: What is glutathione and why must we protect patient access to it?