medical grade b12 injections for humans Boost Energy and Wellness with Rx B-12 Vitamin Injections | Medspa
Description
If a lump persists beyond 2 weeks, hardens significantly, or becomes increasingly painful, contact a healthcare provider

The prevalence of cobalamin deficiency among vegetarians assessed by serum vitamin B12: a review of literature. European Journal of Clinical Nutrition 68(5) (2014): 541548

They differ in dosage, how you take them, and how well your body absorbs them

It gives very little detail about why the patient is hurting
