Typical Dose: 250 mcg 500 mcg per day Administration: Subcutaneous injection, usually into abdominal fat for better absorption Timing: Most protocols recommend morning dosing to coincide with natural fat metabolism cycles Clinical research suggests higher doses dont necessarily mean better results


Also, people who have had surgery on their intestines, like weight loss surgery, or have diseases that affect the gut, like Crohns disease or celiac disease, are also at risk of not getting enough vitamin B12 Anyone considering self-administering their own injections should confirm this is appropriate for their situation with their provider first, since not every patient or every formulation is suited to at-home dosing Last updated: April 1, 2026 If you have been feeling unusually tired this spring or wondering whether a vitamin B12 injection might be the answer, you are not alone PMID: 30098070 51 Each vial contains sterile water and is preserved with 0.9% benzyl alcohol to prevent bacterial growth, allowing for safe, repeated needle entry
Preprint at bioRxiv Vinacour M, Moiana M, Forn I, Jung K, Bertea M, Valdayo PMC, Nikel PI, Imhof A, Palumbo MC, Porto DFD et al (2023) Genetic dissection of the degradation pathways for the mycotoxin fusaric acid in Burkholderia ambifaria T16