can pharmacy give b12 injections Vitamin (Cyanocobalamin Injections) — Mountainside Medical B12 Injections for Weight Loss:

Getting vitamin B12 injections to raise your B12 level to where it should be often improves symptoms like: If left untreated, vitamin B12 deficiency can lead to severe problems, including neurological (nervous system) damage that cant be reversed

Neuroscience

Fermented foods (such as tempeh), nori, spirulina, chlorella algae, and unfortified nutritional yeast cannot be relied upon as adequate or practical sources of B-12.39,40 Vegans must regularly consume reliable sourcesmeaning B-12 fortified foods or B-12 containing supplementsor they could become deficient, as shown in case studies of vegan infants, children, and adults

Route reported Oral capsule/powder is by far the most commonly discussed route commercially