Compare peptide purity across brands using real third-party lab tests from Peptigrity — with the test spread (not just an average) and net peptide content (how many mg are actually in the vial), both computed from the lab database. Built on independent tests: no test can be paid for, hidden, or removed.
| Brand / shop | Avg HPLC purity | Spread | Net content | Last tested | |
|---|---|---|---|---|---|
| Power Peptides1 test only | 99.99%Excellent | 1 test99.99% | 110%of label | Jun 24, 2025 | View → |
| PEPTIDE Power1 test only | 99.99%Excellent | 1 test99.99% | 99%of label | Nov 4, 2025 | View → |
| HPR1 test only | 99.98%Excellent | 1 test99.98% | 117%of label | Sep 5, 2025 | View → |
| Humatide1 test only | 99.98%Excellent | 1 test99.98% | 104%of label | Jul 1, 2026 | View → |
| Strate Labs1 test only | 99.97%Excellent | 1 test99.97% | 148%of label | Aug 15, 2025 | View → |
| vicorpus.com1 test only | 99.97%Excellent | 1 test99.97% | 152%of label | Mar 10, 2026 | View → |
| Omega Peptides Australia1 test only | 99.97%Excellent | 1 test99.97% | 106%of label | Jul 25, 2025 | View → |
| studzpeptides.com | 99.97%Excellent | 2 tests99.95–99.98% | 104%of label | Jul 5, 2026 | View → |
| blueskypeptide.com1 test only | 99.96%Excellent | 1 test99.96% | — | Jun 23, 2026 | View → |
| Kensington Labs1 test only | 99.95%Excellent | 1 test99.95% | 94%of label | Jul 9, 2025 | View → |
| BleauGenics1 test only | 99.95%Excellent | 1 test99.95% | 86%of label | Mar 26, 2025 | View → |
| Coastal Peptides1 test only | 99.94%Excellent | 1 test99.94% | 98%of label | Oct 1, 2025 | View → |
| Peptidic1 test only | 99.93%Excellent | 1 test99.93% | 366%of label | Sep 24, 2024 | View → |
| Prosperity Peptides | 99.93%Excellent | 3 tests99.92–99.94% | 115%of label | Feb 21, 2026 | View → |
| Purified Peptide1 test only | 99.92%Excellent | 1 test99.92% | 106%of label | Feb 18, 2026 | View → |
| Vera Peptides1 test only | 99.92%Excellent | 1 test99.92% | 106%of label | Apr 7, 2026 | View → |
| Life Peptide1 test only | 99.91%Excellent | 1 test99.91% | 120%of label | Jun 4, 2026 | View → |
| Simple Peptide | 99.9%Excellent | 7 tests99.81–99.97% | 100%of label | Mar 2, 2026 | View → |
| Peptide Crafters | 99.9%Excellent | 7 tests99.73–99.99% | 111%of label | Feb 16, 2026 | View → |
| Instant Peptides | 99.9%Excellent | 2 tests99.87–99.93% | 108%of label | Apr 29, 2026 | View → |
| Bulk Peptide Supply | 99.9%Excellent | 3 tests99.9–99.9% | 97%of label | Aug 12, 2025 | View → |
| ThreeSide Peptides1 test only | 99.9%Excellent | 1 test99.9% | 107%of label | Jan 22, 2026 | View → |
| Rescue Research USA | 99.9%Excellent | 5 tests99.77–99.96% | 113%of label | Apr 21, 2026 | View → |
| modernresearchpeptides.net1 test only | 99.9%Excellent | 1 test99.9% | 109%of label | May 30, 2026 | View → |
| Nextgen Peptides1 test only | 99.89%Excellent | 1 test99.89% | 105%of label | Apr 21, 2026 | View → |
| Glowing Peptides1 test only | 99.89%Excellent | 1 test99.89% | 106%of label | Feb 27, 2026 | View → |
| Skye Peptides | 99.88%Excellent | 14 tests99.57–100% | 109%of label | Nov 5, 2025 | View → |
| Atomik Labz | 99.88%Excellent | 3 tests99.78–99.97% | 113%of label | Feb 2, 2026 | View → |
| Vantyx Research | 99.88%Excellent | 2 tests99.85–99.92% | 100%of label | Mar 9, 2026 | View → |
| Trulab Peptides1 test only | 99.88%Excellent | 1 test99.88% | 104%of label | May 18, 2026 | View → |
| PeptidePlugs1 test only | 99.87%Excellent | 1 test99.87% | 110%of label | Apr 22, 2026 | View → |
| Disguised Alpha | 99.87%Excellent | 4 tests99.8–99.97% | 116%of label | Apr 22, 2026 | View → |
| Peptidex1 test only | 99.87%Excellent | 1 test99.87% | 98%of label | Nov 24, 2025 | View → |
| Rivn Research | 99.87%Excellent | 3 tests99.84–99.91% | 96%of label | Apr 5, 2026 | View → |
| honestpeptide.com | 99.87%Excellent | 2 tests99.81–99.93% | 106%of label | Apr 23, 2026 | View → |
| utherpeptide.com | 99.87%Excellent | 3 tests99.83–99.93% | 115%of label | Oct 27, 2025 | View → |
| Mile High Compounds | 99.86%Excellent | 6 tests99.78–99.96% | 115%of label | Mar 9, 2026 | View → |
| Pure Peptides | 99.86%Excellent | 2 tests99.73–99.98% | 119%of label | Mar 12, 2026 | View → |
| Simon's Compounding | 99.86%Excellent | 3 tests99.8–99.97% | 105%of label | Feb 26, 2026 | View → |
| Peptide Koning | 99.86%Excellent | 3 tests99.78–99.93% | 111%of label | Feb 18, 2026 | View → |
| americanpeptides.us | 99.85%Excellent | 2 tests99.8–99.9% | 101%of label | Jul 7, 2026 | View → |
| VRIL Peptides1 test only | 99.84%Excellent | 1 test99.84% | 110%of label | Mar 30, 2026 | View → |
| RUO | 99.84%Excellent | 6 tests99.64–99.97% | 104%of label | Apr 22, 2026 | View → |
| Chameleon Peptides | 99.84%Excellent | 3 tests99.79–99.93% | 102%of label | Jun 1, 2026 | View → |
| Peptide Hackers1 test only | 99.84%Excellent | 1 test99.84% | 114%of label | Dec 10, 2025 | View → |
| Everest Peptides | 99.84%Excellent | 3 tests99.82–99.86% | 113%of label | Jun 7, 2026 | View → |
| ascend.science peptides1 test only | 99.84%Excellent | 1 test99.84% | 101%of label | May 9, 2026 | View → |
| onedaycompounds.com | 99.84%Excellent | 4 tests99.8–99.96% | 101%of label | Jun 21, 2026 | View → |
| Primal Peptides | 99.83%Excellent | 2 tests99.8–99.87% | 94%of label | Jan 6, 2026 | View → |
| Regenerative Research | 99.83%Excellent | 5 tests99.4–99.95% | 98%of label | Apr 13, 2026 | View → |
| Peptide Partners | 99.83%Excellent | 4 tests99.73–99.94% | 105%of label | Apr 3, 2026 | View → |
| Felix Chemical Supply | 99.83%Excellent | 18 tests99.5–100% | 170%of label | Apr 26, 2026 | View → |
| Mindful Research1 test only | 99.82%Excellent | 1 test99.82% | 100%of label | Feb 3, 2025 | View → |
| ignitepeptides.com1 test only | 99.82%Excellent | 1 test99.82% | 116%of label | Feb 22, 2026 | View → |
| Honest Peptide1 test only | 99.81%Excellent | 1 test99.81% | 116%of label | Jul 31, 2025 | View → |
| KÖLD | 99.81%Excellent | 2 tests99.61–100% | 106%of label | Mar 9, 2026 | View → |
| BioBoostX1 test only | 99.81%Excellent | 1 test99.81% | 116%of label | Jan 20, 2026 | View → |
| NOVA Labs | 99.81%Excellent | 3 tests99.75–99.85% | 107%of label | Jun 14, 2026 | View → |
| ezpeptides.com1 test only | 99.81%Excellent | 1 test99.81% | 95%of label | Jun 10, 2026 | View → |
| lapeptides.net | 99.81%Excellent | 4 tests99.7–99.9% | 108%of label | May 12, 2026 | View → |
| Licensed Peptides | 99.8%Excellent | 2 tests99.8–99.8% | 106%of label | Feb 9, 2026 | View → |
| Core Peptides1 test only | 99.8%Excellent | 1 test99.8% | 128%of label | Dec 9, 2025 | View → |
| Particle Peptides | 99.8%Excellent | 3 tests99.8–99.8% | 102%of label | Mar 13, 2026 | View → |
| Ascension Peptides | 99.8%Excellent | 2 tests99.78–99.81% | 100%of label | Feb 7, 2026 | View → |
| Aminos Research | 99.8%Excellent | 2 tests99.68–99.91% | 110%of label | Nov 6, 2025 | View → |
| Gentleman Peptides | 99.8%Excellent | 2 tests99.7–99.9% | 106%of label | May 2, 2026 | View → |
| BulkGLP1 test only | 99.8%Excellent | 1 test99.8% | 96%of label | Apr 19, 2026 | View → |
| NovaCell Peptides | 99.8%Excellent | 2 tests99.8–99.8% | 103%of label | Apr 27, 2026 | View → |
| Adria Science | 99.8%Excellent | 2 tests99.8–99.8% | 123%of label | May 28, 2026 | View → |
| modifiedaminos.shop peptides1 test only | 99.8%Excellent | 1 test99.8% | 97%of label | Apr 20, 2026 | View → |
| corepeptides.com | 99.8%Excellent | 2 tests99.79–99.8% | 100%of label | Apr 28, 2026 | View → |
| cosmicpeptides.com1 test only | 99.8%Excellent | 1 test99.8% | 100%of label | Jan 9, 2026 | View → |
| GoAlpha Labs | 99.79%Excellent | 9 tests99.5–99.97% | 105%of label | Apr 12, 2026 | View → |
| Verified Peptides | 99.79%Excellent | 16 tests98.5–99.98% | 103%of label | Apr 17, 2026 | View → |
| Arcane Peptides | 99.79%Excellent | 3 tests99.64–99.97% | 102%of label | Apr 22, 2026 | View → |
| Panda Peptides1 test only | 99.79%Excellent | 1 test99.79% | 108%of label | Jun 1, 2026 | View → |
| Royal Peptides | 99.78%Excellent | 5 tests99.48–99.97% | 120%of label | Dec 31, 2025 | View → |
| 24PEPTIDES | 99.78%Excellent | 4 tests99.7–99.8% | 107%of label | May 11, 2026 | View → |
| Omegamino1 test only | 99.77%Excellent | 1 test99.77% | 110%of label | Apr 8, 2026 | View → |
| Wolverine Peptides | 99.77%Excellent | 3 tests99.66–99.9% | 106%of label | May 5, 2026 | View → |
| Simply Peptides1 test only | 99.77%Excellent | 1 test99.77% | 94%of label | May 27, 2026 | View → |
| Instant Peptides | 99.76%Excellent | 3 tests99.54–99.94% | 103%of label | Mar 9, 2026 | View → |
| EvoLabs Research1 test only | 99.75%Excellent | 1 test99.75% | 111%of label | Nov 25, 2025 | View → |
| Tydes | 99.75%Excellent | 3 tests99.65–99.86% | 116%of label | Jan 30, 2026 | View → |
| Crush Research Supply | 99.75%Excellent | 6 tests99.47–99.91% | 108%of label | Apr 22, 2026 | View → |
| Purity Peptides | 99.75%Excellent | 3 tests99.74–99.75% | 110%of label | May 19, 2026 | View → |
| Peppy&Me | 99.75%Excellent | 2 tests99.6–99.9% | 100%of label | Apr 10, 2026 | View → |
| Protide Health | 99.75%Excellent | 10 tests99.6–99.88% | 112%of label | Jun 8, 2026 | View → |
| Profound Aminos | 99.74%Excellent | 9 tests99.51–99.99% | 122%of label | May 4, 2026 | View → |
| XL Peptides | 99.73%Excellent | 3 tests99.58–99.92% | 103%of label | Feb 17, 2026 | View → |
| AMINOVA Research Supply1 test only | 99.73%Excellent | 1 test99.73% | 122%of label | Mar 26, 2026 | View → |
| Excalibur Peptides | 99.73%Excellent | 2 tests99.6–99.86% | 116%of label | Jun 12, 2026 | View → |
| Nova Peptide Supply | 99.72%Excellent | 10 tests99.32–99.92% | 119%of label | Apr 27, 2026 | View → |
| BetterBio Synthesis | 99.72%Excellent | 2 tests99.54–99.89% | 97%of label | Apr 10, 2026 | View → |
| Peptide Pro Canada | 99.72%Excellent | 2 tests99.61–99.84% | 107%of label | Jun 3, 2026 | View → |
| Glacier Aminos | 99.71%Excellent | 9 tests98.89–99.99% | 129%of label | May 11, 2026 | View → |
| Regen Peptides1 test only | 99.71%Excellent | 1 test99.71% | 112%of label | May 26, 2026 | View → |
| Synthesis Peptides | 99.71%Excellent | 6 tests99.38–99.95% | 104%of label | May 8, 2026 | View → |
| IRON Peptides | 99.71%Excellent | 3 tests99.5–99.84% | 112%of label | Mar 6, 2026 | View → |
| volterasciences.com1 test only | 99.71%Excellent | 1 test99.71% | 106%of label | May 8, 2026 | View → |
| Noble Chems | 99.7%Excellent | 3 tests99.7–99.7% | 98%of label | Mar 29, 2026 | View → |
| Luxara Research Company1 test only | 99.7%Excellent | 1 test99.7% | 92%of label | Apr 20, 2026 | View → |
| AMP1 test only | 99.7%Excellent | 1 test99.7% | 100%of label | May 15, 2026 | View → |
| saiyanmed.com1 test only | 99.7%Excellent | 1 test99.7% | 83%of label | Apr 21, 2026 | View → |
| globalaminos.com peptides1 test only | 99.69%Excellent | 1 test99.69% | 100%of label | May 20, 2026 | View → |
| Peptide Pro Shop | 99.68%Excellent | 2 tests99.56–99.8% | 101%of label | Feb 28, 2026 | View → |
| Petratide Science | 99.68%Excellent | 10 tests99.34–99.92% | 102%of label | May 30, 2026 | View → |
| Zen Aminos | 99.68%Excellent | 16 tests99.33–99.94% | 61%of label | Jun 2, 2026 | View → |
| DS Research Peptides1 test only | 99.68%Excellent | 1 test99.68% | 116%of label | Apr 10, 2026 | View → |
| Peakform Peptides | 99.68%Excellent | 3 tests99.53–99.76% | 103%of label | Jan 23, 2026 | View → |
| Crystal Peptides EU1 test only | 99.68%Excellent | 1 test99.68% | 94%of label | May 26, 2026 | View → |
| mspeptides.com | 99.68%Excellent | 3 tests99.36–99.93% | 114%of label | Mar 18, 2026 | View → |
| BioLongevity Labs | 99.67%Excellent | 9 tests98.8–99.84% | 129%of label | Apr 27, 2026 | View → |
| Beyond Peptides1 test only | 99.67%Excellent | 1 test99.67% | 115%of label | Dec 17, 2025 | View → |
| Blank Peptides | 99.67%Excellent | 14 tests99.27–99.88% | 102%of label | Apr 7, 2026 | View → |
| aavantpeptides.com1 test only | 99.67%Excellent | 1 test99.67% | 108%of label | Dec 23, 2025 | View → |
| Hydro Research Peptides1 test only | 99.66%Excellent | 1 test99.66% | 106%of label | Nov 20, 2025 | View → |
| Loti Labs1 test only | 99.66%Excellent | 1 test99.66% | 104%of label | Mar 26, 2026 | View → |
| Optima Chemical supply1 test only | 99.66%Excellent | 1 test99.66% | 106%of label | Nov 20, 2025 | View → |
| Modern Aminos | 99.66%Excellent | 4 tests99.29–99.96% | 109%of label | Mar 10, 2026 | View → |
| Grey Market Peptides | 99.66%Excellent | 3 tests99.56–99.81% | 96%of label | Feb 16, 2026 | View → |
| TNN Peptides | 99.66%Excellent | 2 tests99.45–99.87% | 99%of label | Sep 3, 2025 | View → |
| EZP1 test only | 99.66%Excellent | 1 test99.66% | 101%of label | May 15, 2026 | View → |
| Empower Peptides | 99.65%Excellent | 7 tests99.15–99.93% | 101%of label | Oct 18, 2025 | View → |
| IonPeptide | 99.65%Excellent | 16 tests99.07–99.89% | 101%of label | Mar 18, 2026 | View → |
| Amino Club | 99.65%Excellent | 2 tests99.54–99.76% | 113%of label | Feb 7, 2026 | View → |
| Reta One Labs | 99.65%Excellent | 7 tests99–99.91% | 108%of label | May 13, 2026 | View → |
| Midwest BioResearch | 99.65%Excellent | 2 tests99.57–99.73% | 100%of label | Apr 26, 2026 | View → |
| Good Science | 99.65%Excellent | 4 tests99.5–99.8% | 102%of label | May 27, 2026 | View → |
| National Science Labs | 99.65%Excellent | 4 tests99.5–99.84% | — | Jun 13, 2026 | View → |
| perfectpeptides.com1 test only | 99.65%Excellent | 1 test99.65% | 105%of label | Jan 2, 2026 | View → |
| Prime Peptides1 test only | 99.64%Excellent | 1 test99.64% | 117%of label | Jan 23, 2026 | View → |
| NeuroLabs Research | 99.64%Excellent | 3 tests99.4–99.94% | 116%of label | Feb 21, 2026 | View → |
| Growth Guys | 99.64%Excellent | 7 tests99.01–99.97% | 98%of label | Apr 28, 2026 | View → |
| Riptide Wellness | 99.64%Excellent | 2 tests99.45–99.83% | 100%of label | Nov 22, 2025 | View → |
| Peptide Supply Co | 99.63%Excellent | 5 tests99.22–99.81% | 99%of label | Feb 28, 2026 | View → |
| Oath Peptides | 99.63%Excellent | 19 tests99.21–99.9% | 174%of label | May 12, 2026 | View → |
| Alpha Peptides | 99.63%Excellent | 5 tests99.45–99.8% | 106%of label | May 1, 2026 | View → |
| Coffee and Peppers | 99.62%Excellent | 11 tests99.04–99.94% | 106%of label | Apr 21, 2026 | View → |
| Elite Research USA | 99.62%Excellent | 3 tests99.42–99.78% | 114%of label | Apr 13, 2026 | View → |
| cernumbiosciences.com1 test only | 99.62%Excellent | 1 test99.62% | 110%of label | Nov 3, 2025 | View → |
| NextGen Peptides | 99.61%Excellent | 9 tests99.09–99.93% | 98%of label | Feb 27, 2026 | View → |
| Elutide | 99.61%Excellent | 3 tests99.5–99.83% | 106%of label | Apr 22, 2026 | View → |
| Bluum Peptides | 99.61%Excellent | 5 tests99.31–99.91% | 109%of label | Jun 12, 2026 | View → |
| Soma Chems | 99.6%Excellent | 3 tests99.27–99.99% | 126%of label | Feb 16, 2026 | View → |
| NuScience Peptides | 99.6%Excellent | 3 tests99.17–99.89% | 130%of label | Mar 20, 2026 | View → |
| NuRev Peptides | 99.6%Excellent | 3 tests99.01–99.98% | 106%of label | Dec 27, 2025 | View → |
| NUPEPS Peptides1 test only | 99.6%Excellent | 1 test99.6% | 67%of label | Jan 18, 2026 | View → |
| Precisely Peptides | 99.6%Excellent | 3 tests99.5–99.8% | 104%of label | Jun 1, 2026 | View → |
| AminoQuest Labs | 99.6%Excellent | 3 tests99.53–99.72% | 114%of label | Feb 27, 2026 | View → |
| Peptira | 99.59%Excellent | 10 tests99.01–99.99% | 103%of label | Jan 18, 2026 | View → |
| Peak Peptides | 99.59%Excellent | 4 tests99.5–99.76% | 117%of label | Apr 9, 2026 | View → |
| Vylix Research | 99.59%Excellent | 3 tests99.38–99.88% | 93%of label | Mar 26, 2026 | View → |
| Real Peptides | 99.58%Excellent | 3 tests99.46–99.8% | 107%of label | Dec 11, 2025 | View → |
| AS-GHK501 test only | 99.58%Excellent | 1 test99.58% | 113%of label | Jul 9, 2026 | View → |
| Penguin Peptides | 99.57%Excellent | 2 tests99.55–99.59% | 103%of label | Jan 21, 2026 | View → |
| ezpeps.com | 99.57%Excellent | 2 tests99.57–99.58% | 107%of label | Jun 7, 2026 | View → |
| Evolabs Research | 99.56%Excellent | 3 tests99.49–99.6% | 109%of label | May 29, 2026 | View → |
| OROS Research | 99.55%Excellent | 8 tests99.18–99.83% | 104%of label | Feb 28, 2026 | View → |
| Eternal Peptides | 99.55%Excellent | 2 tests99.37–99.73% | 102%of label | Jan 14, 2026 | View → |
| Astra Peptides | 99.55%Excellent | 4 tests99.41–99.68% | 101%of label | Jan 27, 2026 | View → |
| NEXAPH | 99.54%Excellent | 2 tests99.19–99.89% | 96%of label | Mar 10, 2026 | View → |
| Peptidology | 99.53%Excellent | 12 tests99–99.8% | 102%of label | Apr 14, 2026 | View → |
| Amino Lair | 99.53%Excellent | 3 tests99.07–99.99% | 118%of label | Jan 13, 2026 | View → |
| Thrive Peptides | 99.52%Excellent | 2 tests99.45–99.59% | 101%of label | Apr 12, 2026 | View → |
| Kimera Chems | 99.52%Excellent | 2 tests99.24–99.8% | 115%of label | May 18, 2026 | View → |
| Research Peptides Europe1 test only | 99.5%Excellent | 1 test99.5% | 109%of label | Nov 28, 2025 | View → |
| Peptify UK1 test only | 99.48%Excellent | 1 test99.48% | 89%of label | May 11, 2026 | View → |
| NELA Peptides | 99.47%Excellent | 2 tests99.04–99.9% | 100%of label | Jan 8, 2026 | View → |
| biopeptitech.com1 test only | 99.47%Excellent | 1 test99.47% | 103%of label | Feb 20, 2025 | View → |
| Polaris Peptides | 99.45%Excellent | 3 tests98.71–99.86% | 97%of label | Jan 8, 2026 | View → |
| Pura Peptide1 test only | 99.45%Excellent | 1 test99.45% | 124%of label | Feb 10, 2025 | View → |
| RC Peptides | 99.45%Excellent | 2 tests99–99.9% | 80%of label | May 6, 2026 | View → |
| Xeno Peptides | 99.45%Excellent | 2 tests99.4–99.5% | 108%of label | Apr 23, 2026 | View → |
| LuvionBio | 99.43%Excellent | 6 tests99.15–99.77% | 109%of label | Mar 14, 2026 | View → |
| New Wave Peptides1 test only | 99.42%Excellent | 1 test99.42% | 99%of label | Jan 13, 2026 | View → |
| Direct Peptides | 99.41%Excellent | 4 tests99.28–99.48% | 98%of label | Mar 14, 2026 | View → |
| Liberty Peptides1 test only | 99.4%Excellent | 1 test99.4% | 103%of label | Jan 27, 2026 | View → |
| HkRoids | 99.4%Excellent | 8 tests99–99.91% | 106%of label | Mar 3, 2026 | View → |
| Vertex Labs | 99.4%Excellent | 3 tests98.8–99.7% | 94%of label | Jun 29, 2026 | View → |
| Omega Peptides1 test only | 99.39%Excellent | 1 test99.39% | 132%of label | Feb 13, 2026 | View → |
| AminoForge | 99.36%Excellent | 3 tests99.05–99.61% | 101%of label | May 21, 2026 | View → |
| Certified Peptides | 99.35%Excellent | 3 tests99–99.8% | 98%of label | Jan 29, 2026 | View → |
| Valor Peptides | 99.34%Excellent | 7 tests98.87–100% | 107%of label | May 14, 2026 | View → |
| Peptide Pro1 test only | 99.33%Excellent | 1 test99.33% | 103%of label | Nov 3, 2025 | View → |
| crownwellresearch.com1 test only | 99.32%Excellent | 1 test99.32% | 110%of label | Feb 3, 2026 | View → |
| Next Generation Compounds1 test only | 99.31%Excellent | 1 test99.31% | 116%of label | Jan 26, 2026 | View → |
| Rhome Research1 test only | 99.31%Excellent | 1 test99.31% | 86%of label | May 28, 2026 | View → |
| ascensionpeptides.com | 99.31%Excellent | 2 tests99.23–99.4% | 102%of label | Jul 3, 2026 | View → |
| Injectify | 99.29%Excellent | 2 tests99.26–99.33% | 97%of label | Jan 8, 2026 | View → |
| VANDL Labs | 99.27%Excellent | 3 tests98.97–99.46% | 96%of label | Jan 1, 2025 | View → |
| Pure Health Peptides | 99.12%Excellent | 5 tests99–99.6% | 106%of label | Apr 12, 2026 | View → |
| Stemcode Peptides | 99.11%Excellent | 2 tests99.06–99.16% | 106%of label | Apr 12, 2026 | View → |
| Research Peptides Lab | 99.08%Excellent | 3 tests98.73–99.32% | 100%of label | Jan 1, 2025 | View → |
| Proforma Peptides | 99%Excellent | 4 tests99–99% | 106%of label | May 19, 2026 | View → |
| Stratford Peptides1 test only | 99%Excellent | 1 test99% | 112%of label | Feb 25, 2026 | View → |
| Evolve BioPep | 98.77%Research grade | 5 tests98–99.8% | 108%of label | Apr 10, 2026 | View → |
| Biolabshop | 98%Research grade | 7 tests98–98% | 105%of label | Jul 16, 2025 | View → |
| Amino Amigos1 test only | 98%Research grade | 1 test98% | 100%of label | Feb 29, 2024 | View → |
| Limitless Life Nootropics | 97.8%Marginal | 2 tests96.76–98.83% | 106%of label | Feb 9, 2026 | View → |
| LIMITLESS biotech1 test only | 95.76%Marginal | 1 test95.76% | 119%of label | Nov 3, 2025 | View → |
Purity is the percentage of the sample that's the target peptide. Net content is how many milligrams of actual peptide are in the vial after water, salts, and solvents. A vial can be 99% pure but contain far less peptide than its label says — net content is the number that determines your real dose. A 99%-pure vial at 60% of label is worse than a 97%-pure vial at 105%.
Learn more in how peptide testing works.
Peptide purity is one of the most important quality indicators. Higher purity means fewer impurities, degradation products, and potential contaminants. Third-party lab testing by independent laboratories provides the most reliable purity data — more trustworthy than vendor-provided certificates.
But purity alone doesn't tell the whole story. Always check the test count. Eight tests all landing at 99%+ is far stronger evidence than a single test at 99.9% — which is why this tool shows the spread and flags single-test brands.
HPLC separates a peptide sample into its individual components and measures the proportion that is the target peptide versus impurities. 99% purity means 99% of the sample is the target peptide.
| Purity Range | Classification | Typical Use Case |
|---|---|---|
| ≥ 99% | Excellent | Quantitative research, sensitive assays |
| 98–98.9% | Research grade | General research applications |
| 95–97.9% | Marginal | Screening, preliminary research only |
| < 95% | Below standard | Not suitable for most applications |
Results come from independently commissioned tests (samples purchased anonymously and tested blind), verified community-submitted reports, and vendor-submitted third-party results — all linked to the original lab documentation. No test can be paid for, hidden, or removed, the same independence promise as the Trust Score. For guidance on commissioning your own test, see how to get your peptides independently tested.
This tool is for educational and informational purposes only and does not constitute medical advice. Peptides discussed may be investigational compounds not approved by the FDA for human use. Peptigrity is an independent review platform and does not sell, endorse, or recommend specific products or vendors.