Support for Nervous System: B12 injections can help maintain nerve health and prevent neurological issues
Vitamin B-12 is a water soluble vitamin that helps with brain and nervous system functions, and the formation of red blood cells
Lipotropic injections most often contain vitamin B12, as it helps support the breakdown of fatty acids and amino acids to produce energy, according to BetterHealth
Here are the best vitamin B12 injection sites for each method: Subcutaneous B12 injection sites Usually, the best places to give yourself a B12 shot subcutaneously are the abdomen, thigh, and upper arm, as you can see in this illustration: Although not shown above, the buttock is another good site for B12 shots
The Typical Starting Dose of 1000 mcg (1 mg) The usual first dose for adults is 1000 mcg (1 mg) of vitamin B12
People with Vitamin B12 deficiencies due to dietary or medical reasons