Group means were compared by one-way ANOVA, followed by a Students unpaired t -test
The amino acid glutathione in this face serum efficiently improves the skins texture
& Fernandez-Checa, J
Ingredients: Water, Glycerin, Pentylene Glycol, Niacinamide, 2,3-Butanediol, 1,5-Hexanediol, Glutathione, Betaine, Tromethamine, Gluconolactone, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Ethylhexylglycerin, Sodium Citrate, Sodium Hyaluronate, Spngomonas Ferment Extract, Citric Acid, 3-O-Ethyl Ascorbic Acid, Melia Azadirachta Flower Extract, Ocimum Sanctum Leaf Extract, Melia Azadirachta Leaf Extract, Curcuma Longa (Turmeric) Root Extract, Corallina Officinalis Extract, Sodium Hyaluronate Crosspolymer, Butylene Glycol, Hydrogenated Lecithin, Xylose, Polyglutamic Acid, Tocopherol, Cholesterol, Dipotassium Glycyrrhizate, Glycine, Cysteine, Sodium Cocoyl Isethionate, Helianthus Annuus (Sunflower) Seed Oil
To defend this claim, they often point to the same two studies: In a study of guinea pigs (which, like humans, cannot make their own vitamin C), glutathione ester supplementation completely prevented scurvy from vitamin C deficient diets