how to do a b12 injection Give Yourself Best Vitamin B12 Injection Sites:

However, trace amounts may be detectable longer depending on the sensitivity of testing methods

Vitamin B12 is water soluble and can be administered by intramuscular or deep subcutaneous injections, so regardless of whether you inject into fat or muscle, it will absorb into your body

Store in a cool, dry place away from sunlight and moisture

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observed in Nature Medicine , NNMT inhibition in adipose tissue produced favorable body composition changes without negatively impacting muscle mass (Kraus et al., Nature Medicine )