As glutathione rises it indirectly inhibits its own synthesis and as glutathione falls the inhibition is released
Moinova, and R.T
Prevents Apoptosis : It also helps to prevent apoptosis, or programmed cell death, by regulating the expression of genes involved in cell survival and growth

Benefits: How to use: Major Ingredients Water, Glycerin, PEG-8, Niacinamide, Butylene Glycol, Methylpropanediol, 1,2-Hexanediol, Betaine, Glycereth-26,m Bis-PEG-18 Methyl Ether Dimethyl Silane, Polyglyceryl-10 Laurate, Bifida Ferment Lysate, Methyl Gluceth-20, Panthenol, Squalane, Glucosylrutin, Hydrogenated Lecithin, Carbomer, Caprylic/Capric Triglyceride, Tromethamine, Xanthan Gum, Propanediol, Flavor, Ethylhexylglycerin, Glutathione(500ppm), Adenosine, Ceramide NP, Sodium Phytate, Benzyl Glycol, Hydrolyzed Glycosaminoglycans, Sodium Hyaluronate, Dextrin, Theobroma Cacao (Cocoa) Extract, Beta-Glucan, Cyanocobalamin, Sodium Hyaluronate Crosspolymer, Tocopherol, Hydrolyzed Hyaluronic Acid, Hydroxypropyltrimonium Hyaluronate, Soluble Collagen, Hyaluronic Acid, Sodium Acetylated Hyaluronate, Sodium Stearoyl Glutamate This list of ingredients represents all options or variants of this product

There are some variations, for example, guidelines in Australia and New Zealand recommend a streamlined two-bag regimen (200 mg/kg over 4 hours, followed by 100 mg/kg over 16 hours)