Both work, for different reasons
The clearest documented precedent is Humatrope, whose FDA label specifies 24 hours refrigerated when reconstituted with sterile water, and 14 days refrigerated with bacteriostatic water
Patients self-injecting vitamin B12 sourced online, finds study A large proportion of patients with a vitamin B12 deficiency are self-injecting medication sourced online, citing difficulty with accessing treatment from GPs
Cartilage and Tissue Repair: Has been studied to promote the healing of tendons, ligaments, cartilage, muscles, wounds, and surgical incisions
Research shows 6 percent of people 60 years old and over are classed as deficient in vitamin B12, and this only increases with age
Adipose-selective fat metabolism