a bottle of its main supplement goes for around $56 on Amazon
The cysteine moiety of GSH can be liberated via -glutamyl cycle in which exported GSH is cleaved sequentially by two exofacial enzymes, namely -glutamyl transpeptidase (GGT) and dipeptidase (DP) to release cysteine which is then imported into the cells 6

Water, Butylene Glycol, Niacinamide, Dipropylene Glycol, Glycereth-26, Hydroxyacetophenone, Glycerin, Sodium Citrate, Caprylyl Glycol, PPG-26-Buteth-26, Glutathione, PEG-40 Hydrogenated Castor Oil, Fragrance, Adenosine, 1,2-Hexanediol, Betaine, Sodium Phytate, Hydroxyethylcellulose, Lactobacillus Ferment, Melia Azadirachta Flower Extract, Ocimum Sanctum Leaf Extract, Melia Azadirachta Leaf Extract, Saccharomyces Ferment, Curcuma Longa (Turmeric) Root Extract, Corallina Officinalis Extract, Dipotassium Glycyrrhizate, Ficus Carica (Fig) Fruit/Leaf Extract, Brassica Oleracea Italica (Broccoli) Extract, Polyglyceryl-10 Stearate, Hydrogenated Lecithin, Solanum Lycopersicum (Tomato) Fruit Extract, Sodium Hyaluronate, Sodium Hyaluronate Crosspolymer, Hydrolyzed Hyaluronic Acid, Hyaluronic Acid, Potassium Hyaluronate, Hydrolyzed Sodium Hyaluronate, Caprylic/Capric Triglyceride, Arginine/Lysine Polypeptide, Pyridoxine, Cyanocobalamin, Tocopherol, Thioctic Acid, Magnesium Ascorbyl Phosphate, Arbutin, Ferulic Acid

Singh, A., & Gupta, D