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Frequently Asked
How pure are your peptides?+
All Pure1st peptides are ≥99% purity by HPLC. Every lot ships with a certificate of analysis.
Do you offer bulk pricing?+
Yes. Registered research accounts see live pricing; email us for bulk quotes above 50 vials.
How do you ship?+
Cold-chain courier, temperature-logged. Domestic overnight and international express with dry ice.
What is your return policy?+
We replace or refund damaged shipments and any lot that fails an incoming QC test performed within 14 days.
Are these for human use?+
No. All products are strictly for laboratory research use and not for human or veterinary consumption.
How is storage handled?+
Store lyophilized peptides at 2–8 °C protected from light. Reconstituted peptides depend on the sequence — see the COA.