get a b12 injection Vitamin Injections (Cyanocobalamin Injections) — Mountainside Medical Vitamin B12 for Injection Cyanocobalamin
Description
Chronic diseases require continuous treatment for 7-14 days, once every 2 days

In older age, vitamin B12 absorption tends to be less efficient due to a range of health issues, including gastritis stomach lining inflammation and thinning but also because of decreased production of stomach secretions (EFSA, 2015

Over time, people have said they get more and more used to it

Rees, W
