5-amino-1mq reconstitution bacteriostatic water 10mg (RUO) – Tide Labs Small Reconstitution Kit –

A vitamin B12 shot is an intramuscular injection of cobalamin given directly into a muscle, usually the upper arm or glute

DOSAGE Tablets: Adults and adolescents over 15 years of age take 1 tablet 3 times a day or as directed by a doctor

By the way, even if you dont have pernicious anemia, but a severe B12 deficiency due to other causes, B12 shots are still the way to go

Absorption of vitamin B 12 is inhibited from both dietary sources and from the bile (enterohepatic circulation) and thus depletion of vitamin B 12 body stores can occur relatively quickly

doi: 10.1042/cs0890421

I think all B vitamins stimulate metabolism and the brain