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

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.

How should I store lyophilized peptides?

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.

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Peptide Systems

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Member of:

GS1-licensed U.S. research supplier

C. Henderson, PhD, QC Scientist - 🛡️ Verified Purchase

"The peptides arrived quickly and had documentation with lot-specific COAs. Purity matched the certs and our assays were reproducible across vials."

Peptides certified sterile, LPS-free, over 99% pure

Certified by 3rd party,
USA registered labs

-Sterile (14D media test)

-Free of microbial contaminants (LPS-free, endotoxin-free, LAL)

-Free of chemical contaminants (TFA, IEX)

-Peptide identity (HPLC, LC-MS)

-Purity >99% (HPLC)

-Quantity verified (LC-MS)

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Peptides certified by FDA-registered lab

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Founded by a scientist,
peptides you can trust

Johnathon Anderson, PhD
Founder

Frustrated by the lack of high quality peptides available on the market, we decided it was time for a change.

We extensively test each product in 3rd party, USA registered labs that have ISO 17025:2017 certification.

So you have a source for research peptides that you can trust.

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Premium Research Peptides

At Peptide Systems, we specialize in the synthesis and supply of ultra-pure peptides, proteins, and amino acid derivatives exclusively for non-human scientific research. Our mission is to deliver research-grade compounds that meet the highest industry standards for purity, potency, and safety, with transparency and trust at every step.

Precision Manufacturing

All peptides are synthesized in our state-of-the-art facility using a combination of solution-phase and solid-phase peptide synthesis (SPPS) technologies. This enables high-throughput production of complex peptides while maintaining exact sequence fidelity. Every batch is synthesized using automated peptide synthesizers for unmatched reproducibility and consistency.

Certified by Advanced Analytics

Each production run undergoes rigorous testing using:

High-Performance Liquid Chromatography (HPLC), to isolate and quantify peptide content and detect impurities. Mass Spectrometry (MS), to confirm molecular weight and structural identity via mass-to-charge ratio analysis. These analytical techniques ensure that every vial we ship is scientifically verified for identity, purity, and consistency, exceeding 99% purity standards. Furthermore, our peptides are independently tested and certified to be:

a. Sterile

b. Free of endotoxins (LPS)

c. Free of residual solvents and other contaminants

This makes them suitable for the most demanding preclinical and academic studies.

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FAQs

How do I verify that your Certificates of Analysis (COAs) are real? Unlike vendors who use internal testing, Peptide Systems uses ISO 17025 accredited third-party laboratories. Each COA includes a verifiable batch ID that can be cross-referenced directly with the testing facility. We track every vial from synthesis to shipping.

What is the difference between 'HPLC Purity' and 'Net Peptide Content'? HPLC Purity (e.g., >99%) refers to the absence of contaminants. Net Peptide Content refers to the actual amount of peptide vs. salt/water weight in the vial. We account for this variance to ensure you receive the precise microgram dosage stated on the label, critical for accurate research reproducibility.

How should I store lyophilized vs. reconstituted peptides? Lyophilized (powder) peptides are stable at room temperature for shipping but should be stored at -20°C for long-term preservation. Once reconstituted, they must be kept at 4°C and used within 2-4 weeks to prevent degradation.

Why don't you provide dosing instructions for human use? Peptide Systems supplies compounds strictly for laboratory research and development. In compliance with FDA regulations (21 CFR), we cannot provide instructions for bodily introduction (human or veterinary). Our products are intended for qualified researchers only.

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