These can include diet, drinking, medications, drug use, etc
A B12 injection is a highly effective way to get this vitamin right where it needs to go, bypassing the digestive system for maximum absorption
B12 Shot Home Kit Includes: 30 Day supply of B12 (methylcobalamin) Shots (10 doses) Syringes Alcohol Pads Physician Access Procedure Intramuscular (IM) Injection, self-administered in frontal thigh area
The short answer is: it depends on what symptoms you have and how deficient you are
Lotz-Havla AS, Wei KJ, Schiergens KA, Brunet T, Kohlhase J, Regenauer-Vandewiele S, Maier EM