what is a safe dose of glutathione Liquid Supplement, Lemon Berry Flavored Acerola Energy Booster w/Zinc, Daily Vitamins & Minerals, Zero Sugar Formulation, Everyday Auto-Immune Support for Adults, 0.34 fl oz, Pack 60 : Health & How to Take Glutathione Effectively:

doi: 10.1016/j.envpol.2013.02.013 45 FormanH

M., Winkelmann, R

The main difference between glutathione and glutathione peroxidase is that glutathione is a tripeptide antioxidant found in cells, while glutathione peroxidase is a family of enzymes that help break down peroxides and protect cells from oxidative damage

Oral Glutathione faces an even bigger challenge, it's largely broken down by stomach acid and digestive enzymes before absorption, which is why many practitioners consider oral Glutathione ineffective for raising blood levels

Standard Dosing Range For skin rejuvenation and addressing loose skin, typical protocols involve 1 to 2 mg of GHK-Cu daily via subcutaneous injection