Research Peptide Vendors
Compare 71 research peptide vendors on facts we checked on their own websites on October 19, 2026 — not on scores. The default order starts from published criteria (transparency, then core compounds in stock, then typical price per mg); editors also adjust placement to spread out vendors with related ownership or shared suppliers so no group clusters together (how the order works). Use the sort links below the filters to see a strict ranking.
- 71
- 42
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Peptide vendors (1–24 of 71)
Default order: published criteria, with editorial spacing of related vendors
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Prime Peptides
Online seller of research peptides with a 23-item public catalog, a testing page naming Janoshik, Freedom Diagnostics.
- COA page
- Public
- Labs named
- Janoshik, Freedom Diagnostics
- FDA letter
- Yes, December 10, 2024
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San Diego Peptides
Online seller of research peptides with a 58-item public catalog, a testing page naming MZ Biolabs.
- COA page
- Public
- Labs named
- MZ Biolabs
- FDA letter
- None found
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Peptide.Express
Research-peptide store with same-day dispatch on US orders placed before 2 PM EST, free shipping over $150, mix-and-match bulk discounts up to 25%, and a lot-matched certificate index naming Freedom Diagnostics and Mistral Diagnostics.
- COA page
- Public
- Labs named
- Freedom Diagnostics, Mistral Diagnostics
- FDA letter
- None found
-
Pure Lab Peptides
Online seller of research peptides with a 115-item public catalog, a testing page naming Janoshik.
- COA page
- Public
- Labs named
- Janoshik
- FDA letter
- None found
-
Royal Peptides
Online seller of research peptides with a 139-item public catalog, a testing page naming Janoshik.
- COA page
- Public
- Labs named
- Janoshik
- FDA letter
- Yes, August 24, 2026
-
Evolve BioPep
Online seller of research peptides with a 76-item public catalog, a testing page naming Ethos Analytics, Vanguard Laboratory, ILS Labs and Chromate.
- COA page
- Public
- Labs named
- Vanguard Laboratory, Chromate, Ethos Analytics, ILS Labs
- FDA letter
- None found
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Modern Aminos
US online seller of research peptides that publishes a searchable certificate-of-analysis page and a written quality-assurance program naming its outside testing labs.
- COA page
- Public
- Labs named
- Kovera, Vanguard Laboratory, Chromate, Freedom Diagnostics, TrustPointe
- FDA letter
- None found
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Licensed Peptides
Online seller of research peptides with a 107-item public catalog, a testing page naming Vanguard Laboratory.
- COA page
- Public
- Labs named
- Vanguard Laboratory
- FDA letter
- None found
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BioLongevity Labs
Online seller of research peptides with a 82-item public catalog, a testing page naming SafeCert Labs, BioRegen and AV Analytics.
- COA page
- Public
- Labs named
- BioRegen, SafeCert Labs, AV Analytics
- FDA letter
- None found
-
Core Peptides
US research-peptide seller whose FAQ names a single outside lab for batch HPLC testing and says COAs appear on product pages.
- COA page
- Public
- Labs named
- Vanguard Laboratory
- FDA letter
- None found
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Ion Peptide
Online seller of research peptides with a 59-item public catalog, a testing page naming Freedom Diagnostics.
- COA page
- Public
- Labs named
- Freedom Diagnostics
- FDA letter
- None found
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LotusPeptide
US-shipped research peptides priced per vial and in 5- and 10-vial packs on a public live price sheet (28 compounds, 44 products), with a white-label program that builds branded peptide stores for partners, a certificate index naming Freedom Diagnostics, Kovera and Vanguard, and UK/EU delivery.
- COA page
- Public
- Labs named
- Kovera, Freedom Diagnostics
- FDA letter
- None found
-
Peptide Partners
US research-peptide seller that posts a dated, per-lot purity certification table naming the laboratory behind each result.
- COA page
- Public
- Labs named
- Kovera, Chromate, BioRegen, TrustPointe
- FDA letter
- Yes, August 24, 2026
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Peptidology
Online seller of research peptides, a testing page naming Vanguard Laboratory.
- COA page
- Public
- Labs named
- Vanguard Laboratory
- FDA letter
- None found
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Plum Labs Research
Online seller of research peptides with a 42-item public catalog, a testing page naming Freedom Diagnostics, Kovera.
- COA page
- Public
- Labs named
- Kovera, Freedom Diagnostics
- FDA letter
- None found
-
Pure Peptides
Online seller of research peptides, a testing page.
- COA page
- Public
- Labs named
- Kovera
- FDA letter
- None found
-
Peptide Crafters
Online seller of research peptides with a 76-item public catalog, a testing page.
- COA page
- Public
- Labs named
- None found
- FDA letter
- None found
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Prime Lab Peptides
Online seller of research peptides with a 72-item public catalog, a testing page.
- COA page
- Public
- Labs named
- None found
- FDA letter
- None found
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Paramount Peptides
Online research-peptide seller that describes its products as USA-made and HPLC-tested, with a dedicated COA page.
- COA page
- Public
- Labs named
- None found
- FDA letter
- None found
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ProtideHealth
Online seller of research peptides with a 55-item public catalog, a testing page.
- COA page
- Public
- Labs named
- None found
- FDA letter
- None found
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Biocollex Research
Online seller of research peptides with a 24-item public catalog, a testing page.
- COA page
- Public
- Labs named
- None found
- FDA letter
- None found
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Bulk Peptide Supply
Online seller of research peptides with a 137-item public catalog, a testing page.
- COA page
- Public
- Labs named
- None found
- FDA letter
- None found
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Swiss Chems
Online seller of SARMs, peptides and nootropics for laboratory research, with a dedicated independent-test-results page.
- COA page
- Public
- Labs named
- None found
- FDA letter
- Yes, December 10, 2024
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Ascension Peptides
US-based online seller of research peptides with a 42-item public catalog, a testing page.
- COA page
- Public
- Labs named
- None found
- FDA letter
- None found
All 71 vendors at a glance
| Vendor | COA readable before purchase | Outside testing lab named | Endotoxin / sterility mentioned | FDA warning letter | Core compounds in stock (of 5) | Typical price index |
|---|---|---|---|---|---|---|
| Prime Peptides | Yes | Janoshik, Freedom Diagnostics | endotoxin | Yes, December 10, 2024 | 5 | 1.01 |
| San Diego Peptides | Yes | MZ Biolabs | endotoxin | None found | 5 | 1.39 |
| Peptide.Express | Yes | Freedom Diagnostics, Mistral Diagnostics | endotoxin | None found | 3 | 0.40 |
| Pure Lab Peptides | Yes | Janoshik | Not found | None found | 5 | 2.17 |
| Royal Peptides | Yes | Janoshik | endotoxin, sterility | Yes, August 24, 2026 | 4 | 0.80 |
| Evolve BioPep | Yes | Vanguard Laboratory, Chromate, Ethos Analytics, ILS Labs | endotoxin | None found | 2 | 0.54 |
| Modern Aminos | Yes | Kovera, Vanguard Laboratory, Chromate, Freedom Diagnostics, TrustPointe | Not found | None found | 2 | 0.91 |
| Licensed Peptides | Yes | Vanguard Laboratory | endotoxin, sterility | None found | 2 | 1.00 |
| BioLongevity Labs | Yes | BioRegen, SafeCert Labs, AV Analytics | endotoxin | None found | 2 | 2.00 |
| Core Peptides | Yes | Vanguard Laboratory | Not found | None found | 0 | No in-stock price |
| Ion Peptide | Yes | Freedom Diagnostics | endotoxin, sterility | None found | 0 | No in-stock price |
| LotusPeptide | Yes | Kovera, Freedom Diagnostics | Not found | None found | 4 | 0.21 |
| Peptide Partners | Yes | Kovera, Chromate, BioRegen, TrustPointe | endotoxin, sterility | Yes, August 24, 2026 | 0 | No in-stock price |
| Peptidology | Yes | Vanguard Laboratory | endotoxin, sterility | None found | 0 | No in-stock price |
| Plum Labs Research | Yes | Kovera, Freedom Diagnostics | endotoxin, sterility | None found | 0 | No in-stock price |
| Pure Peptides | Yes | Kovera | Not found | None found | 0 | No in-stock price |
| Peptide Crafters | Yes | Not found | endotoxin, sterility | None found | 5 | 0.93 |
| Prime Lab Peptides | Yes | Not found | endotoxin, sterility | None found | 5 | 0.97 |
| Paramount Peptides | Yes | Not found | Not found | None found | 5 | 0.98 |
| ProtideHealth | Yes | Not found | endotoxin | None found | 4 | 1.00 |
| Biocollex Research | Yes | Not found | endotoxin, sterility | None found | 3 | 1.32 |
| Bulk Peptide Supply | Yes | Not found | Not found | None found | 2 | 0.32 |
| Swiss Chems | Yes | Not found | Not found | Yes, December 10, 2024 | 2 | 0.66 |
| Ascension Peptides | Yes | Not found | Not found | None found | 2 | 0.98 |
| Amino Amigos | Yes | Not found | Not found | None found | 2 | 1.00 |
| Sports Technology Labs | Yes | Not found | Not found | None found | 2 | 2.17 |
| Backroad Aminos | Yes | Not found | Not found | None found | 1 | 0.78 |
| Voltera Sciences | Yes | Not found | endotoxin, sterility | None found | 1 | 0.79 |
| Ramp Peptides | Yes | Not found | Not found | None found | 1 | 0.80 |
| Astro Peptides | Yes | Not found | Not found | None found | 0 | No in-stock price |
| Liberty Peptides | Yes | Not found | endotoxin | None found | 0 | No in-stock price |
| Loti Labs | Yes | Not found | Not found | None found | 0 | No in-stock price |
| NextGenPeps | Yes | Not found | Not found | None found | 0 | No in-stock price |
| NUPEPS Peptides | Yes | Not found | Not found | None found | 0 | No in-stock price |
| NuScience Peptides | Yes | Not found | Not found | Yes, August 24, 2026 | 0 | No in-stock price |
| Paradigm Peptides | Yes | Not found | Not found | None found | 0 | No in-stock price |
| Science.bio | Yes | Not found | sterility | None found | 0 | No in-stock price |
| Simple Peptide | Yes | Not found | endotoxin, sterility | None found | 0 | No in-stock price |
| Studz Aminos | Yes | Not found | Not found | None found | 0 | No in-stock price |
| TriVial BioWorks | Yes | Not found | endotoxin | None found | 0 | No in-stock price |
| Xcel Peptides | Yes | Not found | Not found | None found | 0 | No in-stock price |
| BioGenix Peptides | Not found | Not found | Not found | None found | 5 | 1.09 |
| Polaris Peptides | Not found | Not found | Not found | None found | 5 | 1.20 |
| Trusted Peptide | Not found | Not found | Not found | None found | 4 | 0.90 |
| JetPeps | Not found | Not found | Not found | None found | 3 | 0.49 |
| Pinnacle Peptide Labs | Not found | Not found | endotoxin | None found | 3 | 1.80 |
| Sunrise BioResearch | Not found | Not found | Not found | None found | 2 | 0.39 |
| Costides | Yes | Not found | Not found | None found | 2 | 0.23 |
| Eros Peptides | Not found | Not found | Not found | None found | 2 | 0.70 |
| Verified Peptides | Not found | Not found | Not found | None found | 2 | 0.70 |
| OmegAmino | Not found | Not found | Not found | None found | 2 | 0.79 |
| Atomik Labz | Not found | Not found | Not found | None found | 2 | 0.91 |
| Peptide Worldwide | Not found | Not found | Not found | None found | 2 | 0.92 |
| Pharma Grade Peptides | Not found | Not found | Not found | None found | 2 | 1.02 |
| Extreme Peptides | Not found | Not found | Not found | None found | 2 | 1.38 |
| PureRawz | Not found | Not found | Not found | Yes, September 8, 2025 | 2 | 2.15 |
| Southern Aminos | Not found | Not found | Not found | None found | 1 | 0.77 |
| Dynamic Peptide | Not found | Not found | Not found | None found | 1 | 1.09 |
| Biotech Peptides | Not found | Not found | Not found | None found | 1 | 1.92 |
| Amino Club | Not found | Not found | Not found | None found | 0 | No in-stock price |
| Elite Research USA | Not found | Not found | Not found | None found | 0 | No in-stock price |
| Flawless Compounds | Not found | Not found | endotoxin, sterility | None found | 0 | No in-stock price |
| Glow Aminos | Not found | Not found | endotoxin, sterility | None found | 0 | No in-stock price |
| Hybiopeptides | Not found | Not found | Not found | None found | 0 | No in-stock price |
| Integrative Peptides | Not found | Not found | Not found | None found | 0 | No in-stock price |
| Labsourced | Not found | Not found | Not found | None found | 0 | No in-stock price |
| LiliPeptide | Not found | Not found | Not found | None found | 0 | No in-stock price |
| Limitless Biotech | Not found | Not found | endotoxin, sterility | None found | 0 | No in-stock price |
| NextechLabs | Not found | Not found | Not found | None found | 0 | No in-stock price |
| Skye Peptides | Not found | Not found | Not found | None found | 0 | No in-stock price |
| Tydes | Not found | Not found | Not found | None found | 0 | No in-stock price |
No vendors match this filter. Choose “All” to see every vendor.
Prices per mg for BPC-157, TB-500, semaglutide, tirzepatide and retatrutide are on the price comparison; FDA enforcement is on peptide warning letters. Looking for prescription programs instead? See telehealth providers.
About our vendor directory
We list a vendor when we can read and cite its public pages. For each one we record only checkable facts: whether it publishes a certificate-of-analysis page, which laboratories it names, what it says about research-use-only status and shipping, each with the URL and check date.
We do not buy samples, run lab tests or score vendors yet, so there are no ratings here. The default order starts from three published facts (transparency, core compounds in stock, typical price per mg); editors also adjust placement to spread out vendors with related ownership or shared suppliers, including businesses connected to our owners, so no group clusters together. That adjustment can place one of those vendors near the top. It is not a quality ranking. A strict criteria ranking with no adjustment and an A–Z view are also available. Vendors whose sites blocked our automated check (3 on October 19, 2026) are left out rather than described from second-hand sources.
See our affiliate disclosure, disclaimer and 2026 transparency report.