vitamin b12 injection merck – Manufacturer such as Hydroxocobalamin Injection: Vitamin B12 for
Description
The shots should be stored and maintained at room temperature

Treatment for black stools depends on the cause

If you SCHEDULE ONLINE, you don't need to be a current patient and can schedule as soon as the same day
Cellular energy metabolism modeling involving vitamin-supported biochemical cycles
Maybe show your GP some info from PAS website...they have a page for health professionals and articles on PA in children (juvenile PA)