IV or Oral Glutathione Which Works Better? At LaserTreat, we get this question all the time! Here's the truth IV Glutathione delivers 90100% absorption, while oral supplements 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: GLUTAT MD Mouth Melt Oral IV Sachets Skin Brightening & Immunity Support L Glutathione Vitamin C Paraben, Sulphate & Alcohol Free Fast Dissolving Pack of 10 Sachets x 3g : Glutathione IV Drip vs Oral Supplements: Which Works Better and Why? The Wellness Co.