is b12 a subcutaneous injection

Rx Item-Water Bacteristatic 25X30 ML Vial by Pfizer Pharma U https://gdx-assets.costco.com/adobe/assets/urn:aaid:aem:eab1a9a8-7908-46d7-851b-b9c0b873c193/as/690843-847__1.avif?width=727&height=727&fit=bounds&canvas=727%2C727 Item Volume::1 Fluid Ounce Injectables – For consistency across studies, document solvent, concentration, storage temperature, freeze–thaw cycles, and light exposure conditions in experimental records

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