B12 can be injected just under the skin (often in the abdomen) or into the muscle (usually the thigh)
M.Del GiaccoE

Bacteriostatic 0.9% Sodium Chloride Injection is not a medication on its own its a diluent or solvent used to prepare other drugs for injection. According to its labeling, this solution is indicated only for diluting or dissolving drugs for injection (whether intravenous (IV), intramuscular (IM), or subcutaneous (SC)).For example, if you have a vial of powdered medication that needs to be injected, you might add this bacteriostatic saline to reconstitute (dissolve) the powder into a liquid form for injection. Similarly, it can be used to dilute concentrated drugs to the proper strength before injecting them. Healthcare providers also sometimes use sterile saline solutions to flush IV lines or injection sites, but in many cases preservative-free saline is preferred for flushing (especially in sensitive patients). The key point is that Bacteriostatic Sodium Chloride 0.9% Injection provides a sterile salt-water medium for mixing medications, and its bacteriostatic property allows the vial to be used for multiple doses or multiple patients (with proper sterile technique) instead of being discarded after a single use

96 Safety B12 is considered safe even at high doses, and no adverse effects have been associated with excess B12 in healthy individuals
Frequency Twice a week Benefits Improves Energy Increases Metabolism Enhances Mood Helps regulate sleep Helps regulate appetite Physician Consent for Treatment A physician may contact you within 24 hours of purchase if additional information is needed
Currently, the standard of care does not include injecting or prescribing unapproved experimental peptides for injuries there is no FDA approval or authoritative guideline endorsing BPC-157 use