Havent done it in people yet. Sikirics recent review does reference some human studies
By reducing tyrosinase activity, glutathione indirectly helps reduce the appearance of dark spots over time
Product Features Fading melasma Reduces dark patches and evens out skin tone Fading acne scars & dark spots Visibly lightens post-acne marks Preventing freckles & hyperpigmentation Helps block future discoloration Key Ingredients - Arbutin 5% - Tranexamic Acid - Glutathione How to use Apply small amount directly onto spots or areas of discoloration Ingredients Water, Arbutin, Glycerin, Cetearyl Alcohol, Butylene Glycol, Niacinamide, Caprylic/Capric Triglyceride, Glyceryl Stearate, Cetyl Ethylhexanoate, Simmondsia Chinensis (Jojoba) Seed Oil, Pyrus Malus (Apple) Fruit Extract, Cetearyl Glucoside, Oenothera Biennis (Evening Primrose) Oil, Persea Gratissima (Avocado) Oil, Plukenetia Volubilis Seed Oil, Thuka Orientalis Leaf Extract, Zanthoxylum Piperitum Fruit Extract, Polygonum Cuspidatum Root Extract, Citrus Limon (Lemon) Fruit Extract, Ginkgo Biloba Leaf Extract, Polygala Tenuifolia Root Extract, Platycodon Grandiflorus Root Extract, Centella Asiatica Extract, Hipophae Rhamnoides Fruit Extract, Coptis Japonica Extract, Pyrus Communis Fruit Extract, Iris Florentina Root Extract, Cucumis Melo (Melon) Fruit Extract, Hedera Helix (Ivy) Leaf/Stem Extract, Rosa Damascena Flower Water, Allantoin, Sodium Hyaluronate, Ascorbyl Glucoside, Tranexamic Acid, Glutathione, Arginine, Adenosine, Caprylyl Methicone, Sorbitan Oleate, Sorbitan Olivate, Sorbitan Sesquioleate, Tocopherol, C12-20 Alkyl Glucoside, Carbomer, Sodium Acryloyldimethyl Taurate Copolymer, 1,2-Hexanediol, Benzyl Glycol, Ethylhexylglycerin, Raspberry Ketone, Disodium EDTA Content 20 ml / 0.7 oz For Topical and Cosmetic Use Only
and blood vessel formation support
It helps support: Cellular protection against oxidative stress Detoxification pathways Immune system function Skin wellness Recovery and overall cellular health Oxidative stress caused by aging, environmental exposure, stress, illness, travel, poor sleep, or intense activity can gradually reduce natural glutathione levels over time
So what protects healthy cells may protect cancer cells as well
