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Reference ranges vary by laboratory and assay method, so results should be interpreted in clinical context and according to local laboratory guidance

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Saenz-Medina, Javier et al

If the peptide restrictions are reversed through formal FDA rulemaking, compounding pharmacies would be legally allowed to prepare those peptides, but only as traditional, patient-specific compounded drugs, not as mass-market or FDA-approved therapies. If the peptides are formally added to the 503A bulk list, he says, pharmacies would have to follow the traditional 503A compounding rules