If you arent truly deficient in vitamin B12, an injection (or oral supplement) is a nice to have, not a must-have .
A double-blind, placebo-controlled trial in 95 patients with irritable bowel syndrome or inflammatory bowel disease and normal B12 levels found no significant improvements in fatigue, although B12 levels increased in the B12 group who received 1000 g per day per os (p.o.) for 8 weeks (form not reported)
For most people, hitting their intake of B12 is easy, but for those who follow a vegetarian or vegan diet diet, where does B12 come from
Choline : Promotes health of nerve cells, cuts muscle recovery time, helps convert fat to energy
U., Friesen, J
Intramuscular B12 Injection Locations The Upper Buttocks The upper buttocks are one of the most common sites for intramuscular B12 injections