Cyanocobalamin injections usually have 1000 mcg/ml of vitamin B12
Ask for per-component certificates , not a single blend certificate
basically, any cruciferous vegetable works well

Ingredients Water, Niacinamide, Sunflower Seed Oil, Glutathione (600mg), Peppermint Leaf Extract, Sulfate Primrose Extract, Yarrow Extract, Mallow Extract, Lemon Chestnut Extract, Speedwell Extract, Skyweed Root Extract, Indian Gooseberry Fruit Extract, Mulberry Bark Extract, Virginia Prunus Leaf Extract, Sodium Hyaluronate, Glyceryl Arachidonate, Glyceryl Linolinate, Panthenol, Tocopheryl Acetate, Sodium Ascorbyl Phosphate, Pyridoxine, Polyacid, Thiamine HCl, Cyanocobalamin, Biotin, Retinyl Palmitate, Acetylhexapeptide-8, Copper Tripeptide-1, Oligopeptide-29, Oligopeptide-32, Palmitoylpentapeptide-4, Cetearyl Olivate, Polyacrylamide, Sorbitan Oleate, 1-2-Hexanediol, Pasqueflower Extract, Cinnabar Fruit Extract, Russian Extract, C13-14 Isoparaffin, Fee, Carbomer, Triethanolamine, Glycerol, Laureth-7, Butylene Glycol, Ethylhexylglycerin, Hydrogenated Lecithin, Polyglyceryl-10 Stearate The manufacturer is responsible for the products ingredients