is the b12 injection safe How Quickly Does a Shot Work? What to Expect Benefits of Vitamin B12 Shots

For diagnosed deficiency, weekly for 6 to 8 weeks, then biweekly, then monthly maintenance based on follow-up labs

Rotate sites between injections to avoid lipohypertrophy

Commonly reported minor adverse effects include nausea, headache, somnolence (drowsiness), and mild paresthesia (tingling or numbness) in the extremities

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Sources: Hong S, Moreno-Navarrete JM, Wei X, et al

Blocks NNMT in fat cells In 3T3-L1 mouse fat cells, 30 M of 5-Amino-1MQ for 24 hours strongly lowered 1-MNA levels direct proof of NNMT inhibition (Neelakantan et al., Biochemical Pharmacology, 2018)