Key Ingredient Glutathione Niacinamide 7 types of Giga White Extracts Ingredient Water, Dipropylene Glycol, PEG-8 Caprylic/Capric Glycerides, Niacinamide, 1,2-Hexanediol, Glutathione, Polyglyceryl-6 Isostearate, Propylene Glycol, Oxygen, Sodium Hyaluronate, Dioscorea Japonica Root Extract, Mentha Piperita (Peppermint) Leaf Extract, Primula Veris Extract, Alchemilla Vulgaris Extract, Veronica Officinalis Extract, Melissa Officinalis Leaf Extract, Achillea Millefolium Extract, Alcohol, Caprylic/Capric Triglyceride, Butylene Glycol, Disodium EDTA, Adenosine, Titanium Dioxide, Equisetum Arvense Callus Extract, Tocopheryl Acetate, Allantoin, Panthenol, Caffeine, Hedera Helix (Ivy) Leaf/Stem Extract, Camellia Sinensis Leaf Extract, Sophora Flavescens Root Extract, Rhododendron Flower Extract, Hericium Erinaceus (Mushroom) Extract, Tremella Fuciformis (Mushroom) Extract, Zelkova Serrata Leaf Extract, Hericium Erinaceus Fruit Extract, Water-Soluble Proteoglycan, Fragrance

So if you can just put in your favorite search engine, cysteine-rich foods, and you get a list of foods from meats to plant-based, to all those things, hey
Efficacy and safety of memantine in children with autism spectrum disorder: results from three phase 2 multicenter studies
10.1007/s00018-020-03587-8 102 LvH.YangH.WangZ.FengH.DengX.ChengG.et al (2019)