The short answer is that glutathione itself is recognized as safe by the FDA, but glutathione IV therapy specifically for cosmetic purposes like skin whitening is not FDA-approved
TB-500 (Thymosin Beta-4 fragment) studied in cell-migration and tissue-remodeling models
Kosik-Bogacka, D
Ingredients Ingredients -Water, Centella Asiatica Extract (13.5%), Butylene Glycol, Dipropylene Glycol, Nelumbo Nucifera Extract, Artemisia Annua Extract, Oryza Sativa (Rice) Extract, Saccharomyces Ferment, Niacinamide (1,000ppm), Glutathione (1,000ppm), Solanum Melongena (Eggplant) Fruit Extract, Melaleuca Alternifolia (Tea Tree) Leaf Extract, Hydrolyzed Collagen, Beta-Glucan, Hippophae Rhamnoides Fruit Extract, Sodium Hyaluronate, Madecassic Acid, Asiaticoside, Asiatic Acid, Squalane, Caprylic/Capric Triglyceride, Hydrogenated Lecithin, Glyceryl Stearate, Cholesterol, Propanediol, Disodium EDTA, Glyceryl Acrylate/Acrylic Acid Copolymer, Cellulose Gum, Xanthan Gum, Inulin, Cellulose, Glucose, Fructose, Polyglucuronic Acid, Hydroxyethyl Urea, Ethylhexylglycerin, Hydroxyacetophenone, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Glycerin, Dipotassium Glycyrrhizate, 1,2-Hexanediol, Carbomer, Arginine

Side Effects Glutathione injectable therapy is generally safe and well-tolerated