what does the b12 injection do You Need a Prescription for Injections? Vitamin B12 Injections | Energy
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Injection technique Subcutaneous injection is straightforward: Clean injection site with alcohol swab Pinch skin to create a fold Insert needle at 45-90 degree angle Inject slowly Remove needle and apply gentle pressure Common injection sites: abdomen (2 inches from navel), thighs, love handles

If anything, most studies seem to trend towards higher B12 levels being protective