b12 folic acid injection Compounded Methylcobalamin (Vitamin B12) Injection, 5mg/mL Folic Acid, Cyanocobalamin & Niacinamide

Some studies suggest that your body may absorb cyanocobalamin slightly better than methylcobalamin

Selective and membrane-permeable small molecule inhibitors of nicotinamide N-methyltransferase reverse high fat diet-induced obesity in mice

Tiredness, stress, ill-health, poor or limited diet will all reduce this absorption further. For some people, taking a vitamin B12 supplement is one of the easiest ways to maintain healthy levels

There are also gel formulations of B12, available as a prescription medication, that is applied to the inside of the nose

[PMC free article] [PubMed] [Google Scholar] 18.Polito A, Intorre F, Andriollo-Sanchez M, Azzini E, Raguzzini A, Meunier N, Ducros V, OConnor JM, Coudray C, Roussel AM, et al