are there side effects to getting b12 injections Vitamin Injections: What You Need Know B12 injection side effects :

In 2003, the famous Ralph Carmel wrote in the New England Journal of Medicine: The administration of folic acid can mask the megaloblastic anaemia caused by cobalamin deficiency

"Maintain cleanliness and avoid administration during wet or dusty conditions." Sheep and cattle can also be exposed to sub-clinical mineral deficiencies if they cannot meet their nutritional requirements from consumed feed during critical stages of the production cycle, such as before joining, lambing/calving or weaning

But lets keep this in context: Its a small study of only 10 people Only one person in the study developed acne after the injection Participants were not tested for baseline vitamin B12 levels before supplementation

Orkin C, Squires KE, Molina J-M, Sax PE, Sussmann O, Lin G, et al

Modulation of the immunosuppressive tumor microenvironment The BM niche in MM patients is intrinsically immunosuppressive, containing cells able to blunt the immune response and adenosine (ADO) that may lead to an anergic status of T, NK, and dendritic cells [10]