Third-party tested. Batch by batch.

Every Hexal-OZ lot is HPLC and mass-spec verified by an independent lab before release. Certificates of analysis stay with the batch — no marketing purity claims without a report.

What we verify

• Identity and assay purity (target ≥99% for peptides; ≥99% typical for oils)
• Residual solvents and heavy metals where applicable
• Sterility for multi-dose vials
• Label match — strength, form, LOT

How to read a LOT

Each vial and carton carries a LOT code. Keep it with your order reference. If anything looks off, stop use and contact support with the LOT and order hash.

Avg. assay purity cited on storefront: 99.4% across verified lots (traceable; not a guarantee for every future batch).