Oral delivery of glutathione: antioxidant function, barriers and strategies ScienceOpen Is Your Glutathione Supplement Really Working? Deciding Between Oral and IV Glutathione? Let's Break it Down! Not sure whether to choose oral or intravenous glutathione? Here's what you need to know! Oral Glutathione: Convenience: Glutathione is often called the master antioxidant and for good reason. This powerful molecule protects your cells from oxidative stress, supports detoxification, and strengthens the immune system. But as we age,