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Every batch is tested by independent third-party laboratories to ensure it exceeds 99% purity, and all products are produced in FDA-audited, cGMP-certified facilities

10.1097/00003086-199704000-00029 60 KeremiB.LohinaiZ.KomoraP.DuhajS.BorsiK.Jobbagy-OvariG.et al (2009)

doi: 10.1182/blood.V124.21.2064.2064 36 AksoyPWhiteTAThompsonMChiniEN

Lancet 374 , 12431251 (2009)
Active B12 assay for diagnosing vitamin B12 deficiency (MIB40) NICE

Air bubbles in the cartridge or needle assembly are normal