Question 1

How do I verify your Certificates of Analysis (COA)?

Accepted Answer

Unlike vendors who use internal testing, Peptide Systems utilizes ISO 17025 accredited third-party laboratories. Every batch comes with a verifiable COA that can be cross-referenced with the testing lab to ensure 99%+ purity and identity confirmation.

Question 2

What is the difference between HPLC Purity and Net Peptide Content?

Accepted Answer

HPLC Purity measures the absence of impurities (like truncated sequences), while Net Peptide Content measures the actual weight of the peptide minus water and counter-ions. We account for both to ensure precise dosing for research accuracy.

Question 3

How should I store lyophilized peptides?

Accepted Answer

Lyophilized peptides remain stable at room temperature during shipping. Upon receipt, store them at -20°C. Once reconstituted with bacteriostatic water, they must be refrigerated at 4°C and used typically within 4 weeks.

Question 4

Why don't you provide dosing instructions?

Accepted Answer

Our products are strictly for laboratory research and development use only. In compliance with FDA regulations, we do not provide instructions for human consumption or dosing. They are intended for use by qualified professionals in a research setting.

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