Glutathione is such a critical soldier in our line of defense that our bodies make it themselves. We even have mechanisms that recycle and reuse it. But what happens when our toxic Excessive glutathione intake contributes to chemotherapy resistance in breast cancer: a propensity score matching analysis World Journal of Surgical Oncology Springer Nature Link A study shows that the antioxidant glutathione feeds cancer cells Ask the Doctors What do glutathione supplements do? UCLA Health Glutathione Deficiency Symptoms: Is Poor Sleep Just the Beginning? Cardiology & Neurology Specialists located in Queens, Forest Hills and Brighton Beach, Brooklyn, NY Advanced Medical Care