can a b12 injection make you feel tired Feeling worse after Injection: Answering concerns Vitamin B12 Side Effects

To maintain consistent results, many providers recommend a series of skinny shots spaced weekly or biweekly initially, followed by maintenance injections as needed

doi: 10.1056/NEJMoa1107494 [PubMed] 24453083 Thakur KT, Probasco JC, Hocker SE, Roehl K, Henry B, Kossoff EH, Kaplan PW, Geocadin RG, Hartman AL, Venkatesan A, Cervenka MC

Keep your IV site clean and dry for the first few hours , and avoid heavy lifting with that arm

2.2.2 Mechanisms linking increased Hcy levels to MetS Elevated Hcy levels exert inhibitory effects on the insulin signaling pathway, primarily by inducing IR through the cysteine-homocysteinylation of the pro-insulin receptor

But dont jump straight to B12