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best site to give b12 injection How a Injection: Step-By-Step Instructions Vitamin C and B12 Injection
Description
No adverse effects, allergic reactions, or irritation have been reported at concentrations up to 3%

Conditions that damage the gut lining can prevent B12 absorption from food or oral supplements

FDA in 2014

Retatrutide Dosing Retatrutide is administered as a once-weekly subcutaneous injection

Drug Laboratories Storage Recommendations B12 1000 & 2000mcg, B-100 Complex, and Trivit-B Complex should always be stored below 25c / 77f

The four below sit closest to it in research community use