how low b12 before injections Vitamin Deficiency: Causes, Symptoms, and Treatment Vitamin B12 Injection Dosage |

See our internal guide: Reconstituting & Storage

18 Support for the poorer bioavailability of cyano-B12 comes from a study comparing sublingual cyano- with methyl-B12 (both 1000 g per day), which found that both forms led to a normalisation of B12 status, but B12 levels increased significantly more in the methyl-B12 form compared with the cyano-B12 form, although the formulations also had other differences the former was a tablet, the latter a spray

Injection techniques such as intramuscular injection require special care to avoid side effects, including potential nerve damage. Very rare but serious reactionssuch as severe allergy, difficulty breathing, chest pain, or signs of infection at the injection siterequire immediate medical attention

Others who have difficulty absorbing nutrients may also have low B12 levels such as individuals who have had gastric bypass surgery or who have certain digestive disorders