Vendor directory
All vendors
Showing 83 vendors with COAs on file. 166 indexable vendor pages. Sort and filter by COA volume, independent labs, measured purity, and how recently they have been tested.
Merit partnerships
14 partners
Glacier Aminos
Code MERIT · 10% off
99
99.8% median
Hydro Research Peptides
Code MERIT · 15% off
97
99.7% median
BioLongevity Labs
Code MERIT · 15% off
96
99.8% median
Orbitrex Peptides
Code Orbitrex10 · 10% off
95
99.7% median
Licensed Peptides
Code MERIT · 5% off
95
99.8% median
Peptide Crafters
Code CRAFTERS10 · 10% off
94
99.7% median
Mile High Compounds
Code merit · 10% off
94
99.7% median
Forge Performance Co.
Code MERIT · 10% off
94
99.7% median
Ignite Peptides
Code MERIT · 10% off
93
99.1% median
True Peptide
Code MERIT · 15% off
82
99.7% median
Southern Aminos
Code MERIT · 15% off
82
99.6% median
Crystal Peptides
Code MERIT · 10% off
63
99.4% median
Puratek Peptides
Code Meritverified · 10% off
43
99.8% median
S1 Research
Code merit · 10% off
37
99.6% median
83 results
Active vendors 55
Strong · 87 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Active
Verified Peptides
🇺🇸
est. 2020
648 COAs · 1 lab · latest Jul 2026
Median purity 99.7%
Strong · 99 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Active
Peptide Partners
🇺🇸
Sheridan, WY
· est. 2014
366 COAs · 4 labs · latest Jul 2026
Median purity 99.7%
Strong · 90 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Active
Skye Peptides
🇺🇸
Los Angeles, CA
· est. 2023
350 COAs · 2 labs · latest May 2026
Median purity 99.7%
Strong · 85 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Active
Simple Peptide
🇺🇸
Delray Beach, FL
· est. 2023
275 COAs · 1 lab · latest Apr 2026
Median purity 99.7%
Strong · 96 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Active
BioLongevity Labs
🇺🇸
Akron, OH
· est. 2024
249 COAs · 3 labs · latest May 2026
Median purity 99.8%
Code MERIT · 15% off
Visit site Strong · 99 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Active
Glacier Aminos
🇺🇸
Fort Collins, CO
· est. 2016
188 COAs · 6 labs · latest May 2026
Median purity 99.8%
Code MERIT · 10% off
Visit site Strong · 95 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Active
Profound Aminos
🇺🇸
Minneapolis, MN
· est. 2025
186 COAs · 4 labs · latest Jun 2026
Median purity 99.8%
Strong · 94 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Active
Peptide Tech
🇺🇸
Sheridan, WY
· est. 2024
167 COAs · 6 labs · latest Jun 2026
Median purity 99.6%
Strong · 95 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Active
Orbitrex Peptides
🇺🇸
Flower Mound, TX
· est. 2025
143 COAs · 7 labs · latest Jun 2026
Median purity 99.7%
Code Orbitrex10 · 10% off
Visit site Strong · 95 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Active
Reta One Labs
🇺🇸
Cypress, TX
· est. 2025
141 COAs · 3 labs · latest Sep 2026
Median purity 99.8%
Strong · 97 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Active
Hydro Research Peptides
🇺🇸
Chicago, IL
· est. 2023
133 COAs · 3 labs · latest Jul 2026
Median purity 99.7%
Code MERIT · 15% off
Visit site Strong · 94 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Active
Peptide Crafters
🇺🇸
116 COAs · 4 labs · latest Jul 2026
Median purity 99.7%
Code CRAFTERS10 · 10% off
Visit site Closed vendors 4
Limited · 45 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Closed
Strate Labs
est. 2025
7 COAs · 1 lab · latest Jul 2026
Median purity 99.4%
Limited · 47 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Closed
MEI-PEPETIDE
🇨🇳
Qingdao
· est. 2025
4 COAs · 1 lab · latest Jul 2025
last tested 14 months ago
Median purity 99.7%
Moderate · 54 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Closed
Nox Amino
🇺🇸
est. 2026
4 COAs · 1 lab · latest May 2026
Median purity 99.7%
Limited · 49 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Closed
Taikangbio
🇭🇰
HK
· est. 2026
3 COAs · 1 lab · latest Apr 2026
Median purity 99.8%
Pending vendors 24
Strong · 95 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Pending
Ion Peptide
🇺🇸
Alpharetta, GA
· est. 2025
694 COAs · 5 labs · latest Jul 2026
Median purity 99.7%
Strong · 85 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Pending
EZ Peptides
🇺🇸
Albuquerque, NM
· est. 2023
294 COAs · 1 lab · latest Jul 2026
Median purity 99.7%
Strong · 82 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Pending
Modern Research Peptides
est. 2025
107 COAs · 1 lab · latest Jul 2026
Median purity 99.7%
Strong · 88 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Pending
Ruo Bio
🇺🇸
est. 2025
96 COAs · 2 labs · latest Sep 2026
Median purity 99.5%
Strong · 94 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Pending
Sunrise Bioresearch
🇺🇸
Tucson, Arizona
· est. 2025
90 COAs · 3 labs · latest Sep 2026
Median purity 99.7%
Strong · 90 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Pending
Polaris Peptides
🇺🇸
Las Vegas, NV
· est. 2024
71 COAs · 2 labs · latest Jun 2026
Median purity 99.7%
Strong · 89 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Pending
Soma Peptides
🇺🇸
Murrieta, California
· est. 2024
62 COAs · 2 labs · latest Jun 2026
Median purity 99.7%
Strong · 96 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Pending
Moglabs
🇺🇸
Sheridan, WY
· est. 2014
57 COAs · 3 labs · latest Sep 2026
Median purity 99.3%
Moderate · 60 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Pending
Certified Peptides
🇺🇸
est. 2024
50 COAs · 2 labs · latest Dec 2025
last tested 9 months ago
Median purity 99.3%
Strong · 94 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Pending
Nova Peptides
est. 2025
46 COAs · 3 labs · latest Jul 2026
Median purity 99.5%
Strong · 86 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Pending
optimasupply.is
46 COAs · 2 labs · latest Aug 2026
Median purity 99.5%
Strong · 88 A 0–100 score earned only from observable evidence: independent COAs (weighted by lab reputation and age), number of distinct labs, median measured purity, evidence breadth, and years active. No reviews, rankings, or price. See /about for full methodology.
Pending
Arcane Peptides
🇺🇸
est. 2025
41 COAs · 2 labs · latest Sep 2026
Median purity 99.6%