So it makes sense that Google is full of people typing: does vitamin b12 speed up your metabolism
It also acts in amino acid transport pathways.*

Hippophae Rhamnoides Water, Glycerin, Dipropylene Glycol, Propanediol, Niacinamide, 1,2-Hexanediol, Caprylic/Capric Triglyceride, Water, PPG-13-Decyltetradeceth-24, Hydroxyacetophenone, Caprylyl Glycol, Hydrogenated Lecithin, Carbomer, Glutathione, Tromethamine, Cetearyl Alcohol, Disodium EDTA, Stearic Acid, Dipotassium Glycyrrhizate, Terminalia Ferdinandiana Fruit Extract, Butylene Glycol, Lecithin, Pentylene Glycol, Acetyl Glutamine, Sodium Hyaluronate, Folic Acid, Bacillus/Soybean Ferment Extract, Oligopeptide-1, Hexapeptide-11, Oligopeptide-2, Oligopeptide-3, Hydrolyzed Pea Protein, Madecassoside, Phytosterols, Squalane, Olea Europaea (Olive) Fruit Oil, Tocopherol, Polyglyceryl-10 Stearate, Panthenol, Hyaluronic Acid, Hydrolyzed Hyaluronic Acid, Hydroxypropyltrimonium Hyaluronate, Hydrolyzed Sodium Hyaluronate, Potassium Hyaluronate, Ceramide NP, Sodium Ascorbyl Phosphate, Butyrospermum Parkii (Shea) Butter, Ethylhexylglycerin, Sodium Hyaluronate Crosspolymer, Biotin, Pyridoxine, Cyanocobalamin, Riboflavin, Thiamine HCl, Retinol, Bioflavonoids, Sodium Acetylated Hyaluronate, Menadione, Acetyl Hexapeptide-8, Copper Tripeptide-1, Palmitoyl Pentapeptide-4, Linoleic Acid, Beta-Carotene, Fragrance

The magic of kefir: A review
Proteomic data and immunoblot quantifications derived from two independent biological replicates are presented as the mean with individual data points overlaid