side effects of having b12 injections Shots And How To Treat Them What Does a B12 Shot

Results are minimal and because its done using toxin, only lasts a couple of months

However, if the underlying cause of your deficiency remains such as pernicious anemia or ongoing medication use that impairs absorption your B12 levels will gradually decline after discontinuation

Differential expression analysis of the active microbial community in the cecum did not reveal significant changes, however, does suggest restructuring of population dynamics in relation to B12 supplementation (Additional file 1 Fig

But for some users, nausea becomes dose-limiting

Examples include Marmite and Nutritional Yeast

Neither route is universally better the right option depends on your medical history, goals, and your providers recommendation