So, you measure a higher B12, but part of that B12 is inactive, so useless Oral B12 supplementation, even in the form of a multivitamin preparation, may result in serum B12 concentrations just within the normal range without abolishing symptoms
Perineural invasion in cancer: a review of the literature

Typ skry: Aktywne skadniki: INCI: Water, Dipropylene Glycol, Methyl Gluceth-20, Glycerin, Ethylhexyl Palmitate, 1,2-Hexanediol, Niacinamide, Hydrolyzed Sponge, Polyacrylate-13, Acrylates/C10-30 Alkyl Acrylate Crosspolymer, Tromethamine, Hydrogenated Polyisobutene, Glutathione(1,004ppm), Epilobium Angustifolium Flower/Leaf/Stem Extract, Polyglyceryl-10 Laurate, Adenosine, Sorbitan Isostearate, Disodium EDTA, Boron Nitride, Xanthan Gum, Panthenol, Butylene Glycol, Citric Acid, Propanediol, Cyanocobalamin, Centella Asiatica Extract, Benzyl Glycol, Hydrolyzed Glycosaminoglycans, Sodium Hyaluronate, Madecassoside, Asiaticoside, Sodium Hyaluronate Crosspolymer, Ethylhexylglycerin, Hydrolyzed Hyaluronic Acid, Madecassic Acid, Asiatic Acid, Atelocollagen, Desamido Collagen, Hydroxypropyltrimonium Hyaluronate, Hydrolyzed Collagen, Palmitoyl Pentapeptide-4, Soluble Collagen, Collagen, Collagen Amino Acids, Acetyl Hexapeptide-8, Copper Tripeptide-1, Hyaluronic Acid, Procollagen, Sodium Acetylated Hyaluronate

Make sure you're not injecting on an empty stomach if this bothers you