how do you give vitamin b12 injections to self-inject intramuscular - Overview Best Vitamin B12 Injection Sites:

The policy recognizes that research needs can change and institutions need assurance on product quality and suitability for their specific experimental applications

Adverse Reaction The use of parenteral injections can sometimes give rise to toxic reactions as well as allergic type responses with respiratory distress

A deficiency in vitamin B12 can cause fatigue, headaches, indigestion, problems with your vision, increased risk of obesity, and cognitive difficulties

2011 Jan;96(1):150-8

each 50 mg vial provides 1020 days of research material

Since Vitamin B12 injections bypass the digestive system, its effects can be more potent than supplements