For general wellness and maintenance, monthly is often enough
However, it may take a number of days or weeks before a person notices improvements in their symptoms
Compounded versions are prepared by licensed pharmacies under physician supervision, using bulk pharmaceutical-grade active pharmaceutical ingredients
Kidney (from beef, lamb, or pork) also provides substantial B12, typically containing 2535 micrograms per 100g
Patients self-injecting vitamin B12 without telling their GP, finds study A large proportion of patients with a vitamin B12 deficiency self-inject medication sourced online, citing difficulty with accessing treatment from GPs
It is not intended for human or veterinary use, and is not intended to diagnose, treat, cure, or prevent any disease.