For research use only. Our products are not intended for human or animal diagnosis, treatment or prevention, and are not for ingestion.
Free US shipping over $150 Β· Weekday orders placed before 15:00 EST ship the same day Β· Third-party reports with every batch
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Research-Grade Peptides

Built for the laboratory.
High-purity research peptides

Every batch is analyzed by an independent laboratory for HPLC purity and LC-MS identity before release. Batch numbers are publicly searchable and the data travels with the product, so results can be repeated and traced.

β‰₯99% HPLC purity COA per batch Weekday dispatch
Browse all productsCheck batch test reports
Vireo Peptides laboratory workspace
Purity 99.42%LC-MS Verified Β· Batch VP-2411-A
πŸ”¬Independent third-party testingDual HPLC + LC-MS verification
🏷️Batch traceableOne unique batch number per vial
πŸ‡ΊπŸ‡ΈUS-based operationsDomestic warehousing and dispatch
🧊Cold-chain friendly packagingLight-proof sealing · stable transit
Lab Staples

Best-selling research peptides

From structure studies to method development, these are the lines our customers reorder most.

View all 8 products β†’
Best seller BPC-157 research peptide sample vial

BPC-157

5mg / 10mg Β· lyophilized powder
$42Includes 5mg vials. Free shipping over $150. Details β†’
TB-500 research peptide sample vial

TB-500

5mg / 10mg Β· lyophilized powder Β· Thymosin Ξ²4 fragment
$46Includes 5mg vials. Free shipping over $150. Details β†’
Copper peptide GHK-Cu copper peptide vial

GHK-Cu

50mg / 100mg Β· copper peptide complex
$58Includes 50mg vials. Free shipping over $150. Details β†’
High purity NAD+ vial

NAD+

500mg / 1000mg Β· coenzyme lyophilized powder
$64Includes 500mg vials. Free shipping over $150. Details β†’
Why Laboratories Choose Us

We do not just stick a label on a vial

We lay out every batch's data for you: test date, instrument trace and measured values.

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Independent third-party testing

Every batch is sent to an independent laboratory for HPLC purity analysis and LC-MS mass confirmation β€” no reports marked "in-house testing".

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Verifiable batch numbers

Vial batch numbers map one-to-one to COA numbers, and original reports can be retrieved by name or batch number on the COA page.

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Ready-to-ship packaging

Lyophilized powder is sealed against light, with storage and reconstitution notes included, limiting any effect of transit on sample integrity.

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Research advisor support

Technical enquiries answered within 24 hours on weekdays, covering dissolution, concentration conversion, storage conditions and other routine lab questions.

Peptide Science

What is a research peptide?

A peptide is a short chain of amino acids linked by peptide bonds, usually 2–50 residues. Compared with proteins, peptide chains are shorter and better defined, which makes receptor interactions easier to study under controlled conditions.

  • Well-defined structure: the sequence is known, so molecular weight and theoretical pI can be calculated exactly.
  • High specificity: most research peptides target a single receptor or pathway, keeping background interference low.
  • Controlled batch variation: dual HPLC and LC-MS verification keeps batch-to-batch consistency.
Explore the science behind research peptides β†’
Amino acid peptide chain structure diagram
See the data first, then decide

Check a batch report

Enter a product name or batch number to pull up that batch's HPLC purity chromatogram and LC-MS identity result. Every report comes from a third-party laboratory and the original file can be downloaded for checking.

HPLC purity β‰₯ 99% Reports updated per batch

Cannot find your batch? Contact a research advisor to obtain historical batch files.

Company

We do one thing: put verifiable samples in your hands

Founded in 2019 and headquartered in the United States, Vireo Peptides focuses on research-grade peptide supply and quality control. Our team's background spans organic synthesis, analytical chemistry and laboratory operations, and every product line has been rebuilt around traceability and reproducibility.

We take no part in sales for clinical, diagnostic or therapeutic use. Our customers are mainly university laboratories, contract research organizations and independent researchers.

40+Batches tested
40+Batches tested
24hTechnical response
Learn more
HPLC analytical instrument
Ordering & Fulfillment

Shipping, packaging and support

🚚 Dispatch times

Orders confirmed before 15:00 EST on a weekday ship that day; orders placed after 15:00 on Friday roll to the next business day.

  • Standard US delivery in 2–4 business days
  • Free standard shipping over $150
  • Online tracking with a carrier number

🧊 Packaging & storage

Lyophilized powder is packed in light-proof sealed vials and is stable short-term at ambient temperature in transit; store cold on receipt as instructed.

  • Storage and reconstitution notes included
  • Avoid repeated freeze-thaw and direct light

↩️ Returns handling

For transit damage, a dispatch error or a batch that does not match its COA, send us the order number and photos within 7 days of receipt and we will handle a replacement or refund case by case.

  • Returns accepted on unopened items within 30 days
  • We cover both shipping legs for quality issues
FAQ

Frequently asked questions

The questions we hear most often about purity, testing, ordering and storage.

What is your purity standard and how is it tested?

Our release standard is HPLC purity β‰₯ 99% for standard products, and β‰₯ 98% for a few categories. The exact figure is whatever appears on that batch's COA. Testing uses a C18 reversed-phase column with UV detection at 220 nm, and purity is calculated from main-peak area percentage.

How do I confirm my batch matches its report?

The vial label carries a unique batch number (formatted like VP-2411-A). Enter it on the COA lookup page to see the matching HPLC chromatogram and LC-MS result. The number must match exactly β€” prefix and letters included.

How soon will my order ship?

Orders paid before 15:00 EST on a weekday ship the same day. Orders after 15:00, or at weekends, roll to the next business day. Public holidays shift dispatch again and are announced on the homepage in advance.

Can I buy in bulk or request custom sizes?

Yes. For five or more vials of one batch, a specific purity, or an unusual fill volume, please contact us with your requirements, including your institution name and intended use, and we will provide a bulk quote and lead-time estimate.

What does your technical support cover?

We can help confirm pack sizes, dissolution suggestions, storage conditions and COA interpretation. We do not advise on experimental design, dosing or clinical matters.

How should lyophilized powder be stored?

Store unopened at -20Β°C, protected from light and moisture, and avoid repeated temperature swings. The powder is stable short-term at ambient temperature during transit, but move it to cold storage promptly on receipt. Long storage at room temperature accelerates moisture uptake and degradation.

View all FAQ categories β†’

Ready for your next experiment?

Eight research peptides in stock, every batch with a third-party report. Not sure which to choose? A research advisor can confirm the right size for you.

Go to products Ask a research advisor