The peptide's effectiveness when given either continuously (daily) or intermittently (4 applications over 10 days) suggests sustained biological effects beyond the peptide's short plasma half-life
Common injection sites include the abdominal area (at least 2 inches from the navel), thighs, or the back of the upper arms
For muscle, tendon, ligament, or nerve repair , injectable forms are significantly more effective due to bioavailability and delivery route
Specifically, taking too much B12 has been linked to acne, according to a 2013 case study published in Cutaneous and Ocular Toxicology
But I've never seen B12 ampoules available in the kind of smaller doses that would be needed to try this
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