are there any side effects from having b12 injections Feeling worse after Injection: Answering concerns Vitamin B12 Injection Side Effects
Description
Neurological impact of vitamin B12 deficiency

I feel great

Results from the National Pathology Alliance benchmarking review

Treated mice showed significant reductions in body weight and white adipose tissue mass compared to untreated controls on the same high-fat diet
Deteriorating muscle strength and function as we get older lead to debilitating conditions like frailty, which can be life threatening

doi: 10.1021/jm9002395 [DOI] [PMC free article] [PubMed] [Google Scholar] 206
