glutathione b12 injection location IM Best Vitamin B12 Injection Site:
Description
Alternate Sites: If rotating injection sites to prevent lipohypertrophy (tissue buildup), you may also use the outer thigh or upper arm fatty tissue

Briani C, Dalla Torre C, Citton V, et al

The symptoms of a B12 deficiency are not necessarily any different between males or females

The association strengthened with higher B12 levels
Injections go straight into your muscle and give your body direct access to the nutrient
