A FOUNDATION FOR DISCOVERYTransparent. Reliable. Verified.VP / RESEARCH MATERIALS
+RESEARCH PEPTIDES. INDEPENDENTLY VERIFIED.
Third-Party Tested Research Peptides
Research begins with what you can verify.
Verified Peptides is a US-based supplier of high-purity peptides for laboratory research. Every batch is independently tested by Janoshik, and its certificate of analysis (COA) is published in our public library.
2019First independent report; supplying since 2020
≥98%Peptide purity grade
50+Compounds available
01 / THE VERIFIED STANDARD
Independent Peptide Testing, Batch by Batch
Janoshik tested.
Verification is part of the material we supply. Every batch undergoes independent testing, with published analytical documentation you can review before it enters your research.
Testing is performed by Janoshik, and every report can be checked directly on janoshik.com. The laboratory, methods and results stay open for your own review.
02
More than a purity percentage.
A full analytical panel assesses batch quality, covering purity, identity, net peptide content, endotoxins, and microbial counts.
03
Batch number traceability
Batch-specific certificates connect analytical results to the material supplied. Review the lot identifier, test date and reported findings together.
Complimentary shipping on orders above $200.On orders over $200.
Same-day dispatchSame-day dispatch
Orders placed before 2PM ET ship the same day.Order before 2PM ET.
2-day delivery2-day delivery
Fast, tracked delivery that keeps transit time short.Fast, tracked shipping.
Insulated cold shippingInsulated shipping
Optional foam-lined packaging with an ice pack.Optional insulation + ice pack.
Tiered PricingTiered Pricing
Lower per-unit pricing as your order size increases.Lower per-unit pricing.
Dedicated supportDedicated support
Help with materials, batch records and orders before and after delivery.Materials, COAs & orders.
03 / OUR TRACK RECORD
Verification has been here from the start.
A trusted supplier.
Our first independent report dates to 2019. Since launching Verified Peptides in 2020, we have continued building a public analytical record with more than 500 published certificates of analysis.
More than six years in research peptides has shaped our network of manufacturers.
05 / FROM SYNTHESIS TO YOUR FACILITY
Before it reaches your bench.
Manufacturing partners, independent testing and batch-level documentation connect each stage from the material’s origin to your research.
01
Synthesis and Finishing
Our manufacturing partners synthesize and purify the peptides we supply. Preparation, vial filling, and lyophilization take place in ISO Class 5 and 7 cleanrooms.
SEQUENCE ASSEMBLYPartner synthesisPurification
02
Intake and Inspection
Verified Peptides reviews each incoming batch through physical inspection of the vials, powder appearance, solubility checks, and vacuum.
03
Third-Party Testing
Samples from each batch are sent to Janoshik for independent analysis. The resulting COAs are reviewed, recorded, and published.
Janoshik
04
Labeling & Storage
Every vial is labeled with a batch number that links it to its analytical records. Batches are held in cold storage until dispatch.
Labeling
Cold storage
05
Fulfillment & Support
Orders placed before 2PM ET ship the same day, with 2-day shipping and optional insulated packaging available. Our team supports questions about orders, materials, and batch records.
Optional
06 / ANALYTICAL DEPTH
Peptide Testing Methods: HPLC, LC–MS, Endotoxin and Microbial Analysis.
Each analytical method tests a different aspect of quality, from peptide purity and identity to endotoxins and microbial counts.
01 / CHROMATOGRAPHY
HPLC
Purity, measured.
High-performance liquid chromatography separates sample components to assess purity and reveal the impurity profile.
02 / MASS SPECTROMETRY
LC–MS
Identity, confirmed.
Liquid chromatography–mass spectrometry combines separation and mass analysis to support confirmation of peptide identity.
03 / ENDOTOXIN ANALYSIS
LAL
Endotoxins, assessed.
Limulus amebocyte lysate testing assesses bacterial endotoxins in the tested sample.
04 / MICROBIAL ENUMERATION
USP ⟨71⟩
Microbial testing.
Measures total aerobic microbial count (TAMC) and total combined yeasts and molds count (TYMC).
Net peptide content, the share of the material that is peptide rather than water, salts or counter-ions, is reported separately from chromatographic purity. Consult the batch record for results, units and testing scope.Review analytical reports
JANOSHIK
Tested exclusively with Janoshik.
We have used one laboratory since our first report in 2019: Janoshik, one of the original peptide-testing labs, with more than ten years in the field and over a thousand tests a month. One lab means every result is measured against the same standard – consistent, comparable, never cherry-picked.
Peptide purity is a specification. Understand the grade.
Peptide synthesis produces material that can undergo further purification for different research requirements. Grades range from crude material to highly purified peptides. Verified Peptides supplies only ≥98% purity grade.
Unpurified
Intermediate purity
≥98%
SYNTHESIS OUTPUT
Crude
Unpurified synthesis output: the target peptide alongside deletion sequences, truncations, and by-products. Used for early screening where the composition is characterized separately.
For reference · not offered by VPFURTHER PURIFICATION
Solid-phase peptide synthesis assembles a peptide step by step on a solid support. Cleavage and purification follow. Purity and identity testing then help characterize the resulting material.
08 / RESEARCH & PERSPECTIVES
Peptide Research & Laboratory Resources
Practical guides to peptide testing, supplier evaluation, and the storage and handling of research materials.
Answers about batch testing, research use, ordering, shipping and storage.
Are your peptides third-party tested?
Yes, every Verified Peptides batch is third-party tested by Janoshik, the independent laboratory we have used exclusively since 2019. Testing covers purity (HPLC), identity (LC–MS), net peptide content, endotoxins (LAL) and microbial counts (USP ⟨71⟩). Every certificate of analysis is published, so you can review the lab results for your batch before it enters your research.
Do your peptides come with a COA, and where do I find it?
Yes, every vial is covered by a batch-specific certificate of analysis (COA). Each vial is labeled with a batch number that links to its published Janoshik report. To find your COA, open our COA library, select your compound, and match the batch number on your vial. If you can’t locate a record, contact our team and we’ll find it for you.
What purity are your peptides?
Every peptide we supply meets a ≥98% purity grade, and the measured HPLC purity for each batch is published on its certificate of analysis. Chromatographic purity shows what share of the detected signal comes from the target peptide.
What does “for research use only” mean?
“For research use only” means our peptides are supplied strictly for laboratory research. They are not for human or veterinary use, or for diagnosing, treating, curing or preventing any disease. Purchasers are responsible for handling, storing and using research peptides in accordance with applicable laws and regulations.
Who can purchase from Verified Peptides?
Verified Peptides sells to institutions, universities, and academic research accounts. Eligibility is reviewed when you register, and approved accounts can order from our full research peptide catalog. Apply for account access to get started.
How much do research peptides cost?
Research peptide prices at Verified Peptides depend on the compound and quantity. Current prices are listed on each product page. Tiered pricing lowers the per-unit cost as your order size increases, and every order over $200 ships free.
How fast does Verified Peptides ship?
Orders placed before 2PM ET ship the same day, with fast, tracked 2-day delivery. Shipping is free on orders over $200. For extra temperature protection, you can choose optional insulated packaging with a foam-lined box and an ice pack.
Do lyophilized peptides need to be refrigerated during shipping?
Not usually. Lyophilized (freeze-dried) peptides are generally stable at room temperature for the short time they spend in transit, which is why insulated cold shipping is optional. Stability varies by compound and transit conditions. We keep every batch in cold storage until dispatch. Once your vials arrive, follow the product’s storage guidance and store them refrigerated or frozen, away from light and moisture. Learn more in our guide to how long lyophilized peptides last.
Where is Verified Peptides located, and do you ship internationally?
Verified Peptides is based in the United States. We currently only ship within the US. International shipping is not currently available.
RESEARCH MATERIALS. DOCUMENTED CONFIDENCE.
Start with the evidence.
Explore our research catalog, review the analytical record, or speak with our team about your material requirements.
