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Peptide therapy should be used under the care of a trained provider

The Vitamin B12 injection is generally very safe

B12 injections are injected into the muscle and dispersed over time, bypassing the digestive tract, so you get much higher absorption than you would orally

It stays stable for roughly 1014 days once mixed

Concentration Math Insulin Syringe Units (U-100, 100 units = 1 mL) Yield at maintenance: at a 1.2 mg combined dose per week, the vial provides ~3 weeks of dosing (15 mg 1.2 mg/wk = 12.5 weeks at total mass, but draws of 16 units twice a week or 16 units once a week land at ~3 weeks of practical use given common dosing patterns)