Early life acetaminophen exposure, glutathione S transferase genes, and development of adolescent asthma in a high risk birth cohort Journal of Allergy and Clinical Immunology What is glutathione and why must we protect patient access to it? Acetaminophen, also known as Tylenol, is used to help with pain & to reduce fever. However, taking too much acetaminophen can be harmful to the liver which filters out toxins & How Dangerous is Tylenol? Can Tylenol (acetaminophen) deplete glutathione levels in the body?