vitamine b12 injection Vitamin B12 Cyanocobalamin injection 1000 mcg Multiple-Dose Vials — Mountainside Medical Cyanocobalamin (Vitamin B12) Injection is sold as an FDA approved generic drug Vitamin B-12 Injectable for Horses,
Description
And hopefully it goes away at some point

Without testing, there is no way to distinguish between B12 deficiency and other causes of similar symptoms, no way to determine the severity of deficiency, and no way to select the most appropriate delivery method

NAD + analogs, flavonoids, small molecule inhibitors (4-amino-quinolines), and antibodies have been shown to have therapeutic potential as immunomodulators in conditions of aging and tumor immunity

Sci Rep 15 , 9438 (2025)

B12 also protects the nervous system and without it someone can develop tingling in the hands or feet
