PMID: 22937864
The preservative isn't infinitely effective

Product Info Brand : It's Skin All Skin Type Volume : 30ml Made in Korea Ingredients Water, Niacinamide, Propanediol, Glycerin, 1,2-Hexanediol, Isopropyl Myristate, Glutathione, Polyglyceryl-4 Caprate, Sodium Citrate, Arginine, Dipropylene Glycol, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Hydroxyacetophenone, Limnanthes Alba (Meadowfoam) Seed Oil, Xanthan Gum, Caprylyl Glycol, Butylene Glycol, Adenosine, Fragrance, Melia Azadirachta Flower Extract, Ocimum Sanctum Leaf Extract, Lactobacillus Ferment, Melia Azadirachta Leaf Extract, Disodium EDTA, Hydrogenated Lecithin, Curcuma Longa (Turmeric) Root Extract, Polyglyceryl-10 Oleate, Polyglyceryl-3 Methylglucose Distearate, Saccharomyces Ferment, Corallina Officinalis Extract, Brassica Oleracea Italica (Broccoli) Extract, Ficus Carica (Fig) Fruit/Leaf Extract, Polyglyceryl-10 Stearate, Dipotassium Glycyrrhizate, Solanum Lycopersicum (Tomato) Fruit Extract, Hyaluronic Acid, Hydrolyzed Hyaluronic Acid, Sodium Hyaluronate, Sodium Hyaluronate Crosspolymer, Caprylic/Capric Triglyceride, Hydrolyzed Sodium Hyaluronate, Potassium Hyaluronate, Arginine/Lysine Polypeptide, Ceramide NP, Panthenol, Pyridoxine, Cyanocobalamin, Thioctic Acid, Tocopherol, Arbutin, Ferulic Acid, Magnesium Ascorbyl Phosphate

For weight loss purposes, the frequency of B12 shots typically depends on the individuals specific needs and the overall weight loss plan
Because oxidative stress contributes to inflammation, pigmentation irregularities and visible ageing, supporting glutathione levels may influence overall skin clarity