how to administer a b12 injection Give Injection: Step-By-Step Instructions Best Vitamin B12 Injection Sites:
Description
First, it blocks the methylation process needed to create serotonin (your brains primary mood stabilizer)

Push the pin through the stopper at an angle in order to direct the stream to the side of the vial
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Beginners should start with 50mg daily for the first 1-2 weeks to assess tolerance, then progress to the standard dose of 75mg daily for weeks 3-8