Research-grade peptides.
Verified before it ships. Every time.
Pure Peptides supplies US-based researchers with independently tested, HPLC-verified peptide compounds. Every vial is third-party confirmed before dispatch. Purity doesn't start in your lab. It starts in ours.
USA
Trusted US Supplier
75+
Independently verified compounds
≥98%
HPLC purity on every batch
100%
Independent third-party COA
Who we are
A US-domestic peptide supplier built on one rule: if it hasn't been independently verified, it doesn't ship.
Pure Peptides was established around a single, non-negotiable standard: every compound we ship must carry a batch-specific Certificate of Analysis produced by an independent, accredited laboratory. We do not test in-house. Removing the conflict of interest from the analytical process is the most important quality decision we make.
We maintain domestic US stock of more than 75 peptide compounds, from growth hormone secretagogues and tissue repair peptides to metabolic and immune modulators. Every compound in the catalogue has a corresponding batch record, an independent HPLC purity result, and a mass spectrometry identity confirmation on file before a single vial is dispatched.
We operate as a focused specialist supplier, not a mass-market distributor. Orders are handled by a small team that understands research procurement requirements. When you contact us about a batch number, a COA discrepancy, or a compound specification, you speak directly to someone who can answer the question.
Third-party tested
≥98% purity guaranteed
Next business day dispatch
Batch-specific COA
Cold-chain included
No bulking agents
How we operate
What sets our compounds apart
Independent testing, no exceptions
Every batch is submitted to an independent, accredited third-party laboratory for HPLC purity analysis and mass spectrometry identity confirmation before any order is dispatched. We do not conduct in-house testing. Eliminating the conflict of interest from the analytical process is the most consequential quality decision we make. It is not negotiable.
Full batch traceability on every order
Each compound carries a unique lot number that runs continuously from synthesis through to the COA and the printed vial label. You can cross-reference the exact analytical run that produced the purity figure on your certificate. Batch-specific COAs are linked directly from each product page and available on request with your order number.
Cold-chain from our facility to your door
Lyophilized peptides are stored under controlled conditions at our US facility and packed with validated thermal insulation and cold packs for every shipment, at no additional charge. Our packaging maintains a stable temperature window for a minimum of 48 hours under standard US domestic transit conditions, covering USPS Priority, UPS Ground, and FedEx standard delivery times.
Stated quantity is actual peptide content
We do not add mannitol or any other bulking agent to our peptides. Some suppliers use bulking agents to improve the visual appearance of the lyophilized cake. The effect is a reduction in actual peptide content relative to the label weight. Every vial we produce is gravimetrically verified during quality control. What the label states is what the vial contains.
Our process
From batch to your door
Synthesis
Peptides are synthesised via solid-phase peptide synthesis (SPPS) to a ≥98% purity specification. Each batch is assigned a unique lot number from the point of production.
Independent lab testing
Every batch is submitted to an accredited, independent third-party laboratory for HPLC purity analysis and MS-UPLC molecular identity confirmation. We do not conduct in-house testing.
COA issued
A batch-specific Certificate of Analysis is produced from the third-party laboratory results and linked directly to your order. Available on request with your lot number at any time.
Cold-chain packing
Each order is packed with validated thermal insulation and cold packs before dispatch, at no additional cost. Packaging maintains a stable temperature window for a minimum of 48 hours under standard US domestic transit conditions.
Next-day dispatch
Orders confirmed before midnight are dispatched the following business day via USPS Priority Mail, UPS, or FedEx with full tracking. No holding, no delays.
Why researchers choose us
More than just a supplier
Verified purity and full documentation are the baseline. Here is what we deliver on top of that.
No customs delays: we ship domestic
All stock is held within the United States. Your order does not clear international customs, does not sit in overseas transit, and does not depend on a foreign shipping window. Consistent domestic supply means your research timeline stays on schedule.
Discreet, unmarked packaging
All orders ship in plain outer packaging with no product names, compound identifiers, company branding, or return address details visible on the exterior. Interior documentation is similarly discreet.
Next business day dispatch
Orders confirmed before midnight are dispatched the following business day via USPS Priority Mail, UPS, or FedEx. Tracked delivery and signature-required options are available at checkout for all order sizes.
Direct, knowledgeable support
All order and research enquiries are handled by a small in-house team. We do not use automated ticketing queues. If you have a question about a batch number, a COA figure, or a compound specification, you will receive a direct answer within one to two business days.
Trusted by research institutions
We have supplied academic institutions, independent research labs, and verified research procurement teams across the United States and internationally. Our documentation standards meet the requirements of institutional purchasing workflows.
Single-compound supply only
We supply individual, single-compound peptides exclusively. Blended or pre-mixed formulations cannot be independently verified for the accurate gravimetric contribution of each component. Reliable quality assurance requires compounds to be sourced and tested individually.
Research use only
All compounds supplied by Pure Peptides are strictly for in-vitro laboratory research. They are not licensed medicines and are not approved for human or veterinary use by the FDA or any other regulatory authority. By purchasing, you confirm that you are acquiring compounds for legitimate scientific research purposes only.