glutathione iv or oral for Skin: vs. – Which Works Better? IV Therapy vs. Oral Supplements:

second vial provides margin for losses

Similar to glutathione, vitamin C and ALA are also potent antioxidants that have numerous attractive features for use in cosmetic and dermatological products, while zinc salts are widely used in cosmetic formulations and are often included as active or supportive ingredients in a wide range of formulations

Zinc supplementation during pregnancy: a double blind randomised controlled trial

Physiol Plant 128:651666 Laureaua C, Blignyb R, Streba P (2011) The significance of glutathione for photoprotection at contrasting temperatures in the alpine plant species Soldanella alpina and Ranunculus glacialis

PubMed , doi:10.3109/14767058.2014.977248