If the excess ROS cannot be neutralized, it leads cancer cells to death
Once you meet the criteria, your GP can prescribe hydroxocobalamin , which is the form of vitamin B12 used by the NHS

Time in a Bottle Eye Serum Aqua/Water/Eau, Propanediol, Bis-Peg-18 Methyl Ether Dimethyl Silane, Glycerin, Methyl Methacrylate Crosspolymer, Benzophenone-4, Polyethylene, Hydroxyethyl Acrylate/Sodium Acryloyldimethyl Taurate Copolymer, Squalane, Ptfe, Xanthan Gum, Phenoxyethanol, 3-O-Ethyl Ascorbic Acid, Propylene Glycol, Sodium Citrate, Bifida Ferment Lysate, Citric Acid, Caffeine, Caprylyl Glycol, 1,2-Hexanediol, Sodium Hydroxide, Polysorbate 60, Plantago Lanceolata Leaf Extract, Carnosine, Oryza Sativa (Rice) Extract, Caprylic/Capric Triglyceride, Disodium Edta, Adenosine, Ginkgo Biloba Leaf Extract, Physalis Pubescens Fruit Juice, Peg-8, Lecithin, Alcohol, Aesculus Hippocastanum (Horse Chestnut) Seed Extract, Glucose, Tocopherol, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Lactic Acid, Silica, Hydrolyzed Soy Flour, Sodium Carbonate, Sodium Phosphate, Saccharomyces/Grape Ferment Extract, Bht, Sodium Chloride, Ascorbyl Palmitate, Potassium Sorbate, Sodium Benzoate, Bacillus Ferment, Camellia Sinensis Leaf Extract, Coffea Arabica (Coffee) Seed Extract, Pongamia Pinnata Seed Extract, Punica Granatum Fruit Extract, Angelica Archangelica Root Extract, Citrus Aurantium Amara (Bitter Orange) Peel Extract, Hydrolyzed Vegetable Protein, Maltodextrin, Trisodium Edta, Acetic Acid, Magnesium Aluminum Silicate, Potassium Chloride, Potassium Phosphate, Ascorbic Acid, Sclerotium Gum, Plankton Extract, Micrococcus Lysate, Sorbic Acid, Retinyl Palmitate, Titanium Dioxide (Ci 77891), Mica, Fd & C Red 40 (Ci 16035)

Immunogenicity is unmeasured
Peptide geroprotector from the pituitary gland inhibits rapid aging of elderly people: results of 15-year follow-up
It therefore appears that the impact of -glutamylcysteine as a physiological redox regulator differs among cell types