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When B12 levels are borderline, clinical suspicion remains high, or total B12 is unreliable (as in chronic liver disease), additional tests can provide clarity

Most antibiotics, methotrexate, and pyrimethamine invalidate folic acid and vitamin B12 diagnostic microbiological blood assays

Nausea, diarrhea, and constipation affect significant portions of the user population, and BPC-157 offers a direct countermeasure

Medical Assessment

10.1016/s0928-4257(99)00123-0 129 SkorjanecS.DolovskiZ.KocmanI.BrcicL.Blagaic BobanA.BateljaL.et al (2009)

Reviews flag this as an unresolved question, especially in patients with current or prior cancer (Sehgal et al., Pharmaceuticals, 2025)