Syringe and Needle Selection Guide by Burt Cancaster Does size matter? Historically, a bigger needle gauge was considered better to prevent damage to red blood cells. However, our recent guidelines recommend using smaller gauge needles (2325 G) for all 24 Hour B12 Injections ThinWell Clinic B12 Injections at Allura Skin, Laser & Wellness Clinic
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what size needle to use for b12 injection What Size Needle for B12 Injection?