Is glutathione supplementation safe during pregnancy? Researchers are studying a possible link between acetaminophen (Tylenol) use during pregnancy and higher autism or ADHD risk. It may lower glutathione, an important antioxidant for brain development. Do you have questions about the use of Tylenol during pregnancy? We spoke with Dr. Janine Hutson, maternal fetal medicine specialist and OBGYN about what the latest research says, what to consider and Glutathione Results Timeline: When To Expect Skin Benefits