People with gut conditions, low stomach acid, or a history of certain procedures sit near the bottom
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What Happens at a B12 Shot Appointment
No chronic or lifetime studies in people exist as of 2026
Together this phenomenon is collectively referred to as the gray market. This gray market is not subject to the quality control regulations that govern the pharmaceutical industry, and testing conducted on a range of peptides including MOTS-c, BPC-157, TB-500, and CJC-1295 by The New Yorker in April showed that many were impure or contained less than the advertised dose
Neuropharmacology 99, 471480