lump under skin from b12 injection site What happens if you inject wrong? Where to Safely Inject B12:

Its often been referred to as the energy vitamin, that helps to maintain muscle tone and promote upkeep of the nervous system and the organs such as the liver, skin, hair, and eyes

Neurology 55 , 8388 (2000)

The human placenta produces the sterile substance HCG, which comes from pregnant women's urine

An ice-cold massage at the above points might decrease the pain.

This fatty layer enables rapid and efficient nerve signal transmission throughout your nervous system

Although homocysteine levels increase with age, a reduction in the cardiovascular risk associated with hyperhomocysteinemia also has been reported in subjects older than 45 years (Reis et al, 1995)