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Peptide Purity Comparison Tool

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.

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118Brands compared
393Tests on file
99.98%Top avg purity
All Semaglutide lab tests →
Brand / shopAvg HPLC puritySpreadNet contentLast tested
Ascension Peptides1 test only99.98%Excellent1 test99.98%104%of labelFeb 24, 2026View →
Peptide Hackers1 test only99.98%Excellent1 test99.98%97%of labelJun 24, 2024View →
blueskypeptide.com1 test only99.97%Excellent1 test99.97%—Jan 16, 2026View →
Evolabs Research99.96%Excellent2 tests99.95–99.97%112%of labelMar 31, 2026View →
biopeptitech.com1 test only99.96%Excellent1 test99.96%120%of labelMar 16, 2026View →
Loti Labs1 test only99.95%Excellent1 test99.95%115%of labelJan 3, 2026View →
Instant Peptides99.92%Excellent3 tests99.89–99.95%113%of labelApr 3, 2026View →
NuScience Peptides99.91%Excellent3 tests99.86–99.95%127%of labelMar 20, 2026View →
Synthesis Peptides1 test only99.91%Excellent1 test99.91%98%of labelSep 12, 2025View →
lapeptides.net99.91%Excellent3 tests99.9–99.92%104%of labelJun 15, 2026View →
NextGen Peptides99.9%Excellent9 tests99.68–99.99%100%of labelFeb 27, 2026View →
Petratide Science1 test only99.9%Excellent1 test99.9%122%of labelMay 4, 2026View →
Peptide Koning1 test only99.9%Excellent1 test99.9%107%of labelNov 13, 2025View →
americanpeptides.us99.9%Excellent2 tests99.9–99.9%105%of labelJul 7, 2026View →
Omegamino1 test only99.89%Excellent1 test99.89%148%of labelFeb 27, 2026View →
Simple Peptide1 test only99.88%Excellent1 test99.88%126%of labelAug 6, 2025View →
OROS Research99.88%Excellent9 tests99.75–99.96%113%of labelMar 10, 2026View →
Blank Peptides99.87%Excellent5 tests99.8–99.97%124%of labelApr 7, 2026View →
BulkGLP1 test only99.87%Excellent1 test99.87%118%of labelMay 30, 2026View →
Instant Peptides99.86%Excellent4 tests99.7–99.95%141%of labelMar 9, 2026View →
Midwest BioResearch1 test only99.86%Excellent1 test99.86%238%of labelJan 9, 2026View →
BleauGenics1 test only99.85%Excellent1 test99.85%113%of labelMay 3, 2024View →
globalaminos.com peptides1 test only99.84%Excellent1 test99.84%111%of labelJul 13, 2026View →
Peptidology99.83%Excellent2 tests99.8–99.86%114%of labelAug 28, 2025View →
Peppy&Me99.83%Excellent3 tests99.7–99.9%101%of labelApr 9, 2026View →
Priority Peptides1 test only99.83%Excellent1 test99.83%111%of labelOct 16, 2024View →
Pura Peptide99.82%Excellent5 tests99.76–99.91%126%of labelJan 23, 2026View →
Empower Peptides99.82%Excellent5 tests99.68–99.88%106%of labelAug 20, 2025View →
VRIL Peptides1 test only99.82%Excellent1 test99.82%108%of labelMar 27, 2026View →
HPR1 test only99.81%Excellent1 test99.81%123%of labelDec 3, 2025View →
NEXAPH1 test only99.81%Excellent1 test99.81%107%of labelFeb 24, 2026View →
LuvionBio99.81%Excellent12 tests99.51–99.92%109%of labelMar 6, 2026View →
Felix Chemical Supply99.81%Excellent24 tests99.55–99.95%107%of labelMar 5, 2026View →
National Science Labs99.81%Excellent2 tests99.7–99.91%125%of labelJun 13, 2026View →
Peptira99.8%Excellent9 tests99.39–99.97%109%of labelJan 11, 2026View →
Peptide Pro Shop1 test only99.8%Excellent1 test99.8%99%of labelFeb 10, 2026View →
Research Ready Peptides1 test only99.8%Excellent1 test99.8%110%of labelOct 10, 2024View →
Research Peptides Europe1 test only99.8%Excellent1 test99.8%95%of labelDec 29, 2025View →
Rivn Research1 test only99.8%Excellent1 test99.8%113%of labelApr 5, 2026View →
Glacier Aminos99.79%Excellent12 tests99.53–99.91%106%of labelApr 30, 2026View →
Research Peptides Lab99.78%Excellent2 tests99.73–99.83%100%of labelJan 1, 2025View →
AminoForge1 test only99.78%Excellent1 test99.78%114%of labelDec 5, 2025View →
IRON Peptides99.78%Excellent2 tests99.72–99.85%107%of labelDec 1, 2025View →
ezpeps.com99.78%Excellent6 tests99.7–99.86%122%of labelApr 16, 2026View →
Penguin Peptides99.77%Excellent4 tests99.64–99.89%105%of labelJan 25, 2026View →
Next Generation Compounds1 test only99.77%Excellent1 test99.77%216%of labelJan 23, 2026View →
Oath Peptides99.77%Excellent9 tests99.1–99.97%116%of labelMar 20, 2026View →
Peptidic99.76%Excellent2 tests99.75–99.77%103%of labelMar 6, 2025View →
IonPeptide99.76%Excellent14 tests99.54–99.91%119%of labelFeb 28, 2026View →
modernresearchpeptides.net99.76%Excellent5 tests99.61–99.91%115%of labelJun 24, 2026View →
Aminos Research99.75%Excellent3 tests99.71–99.79%109%of labelSep 26, 2025View →
ezpeptides.com99.75%Excellent2 tests99.73–99.77%110%of labelMay 25, 2026View →
Lab Trust Peptides1 test only99.74%Excellent1 test99.74%103%of labelJun 10, 2024View →
Peptide Pro Canada99.74%Excellent2 tests99.64–99.85%104%of labelJun 3, 2026View →
AMP99.74%Excellent2 tests99.74–99.75%110%of labelMay 25, 2026View →
Nova Peptide Supply99.73%Excellent2 tests99.68–99.78%116%of labelApr 9, 2026View →
Mile High Compounds99.72%Excellent2 tests99.63–99.8%103%of labelFeb 7, 2026View →
Optima Chemical supply99.72%Excellent5 tests99.09–99.99%125%of labelApr 17, 2025View →
Power Peptides1 test only99.72%Excellent1 test99.72%164%of labelMay 17, 2024View →
Chameleon Peptides1 test only99.72%Excellent1 test99.72%111%of labelJan 13, 2026View →
Panda Peptides1 test only99.72%Excellent1 test99.72%111%of labelJan 13, 2026View →
Modern Aminos99.71%Excellent2 tests99.48–99.94%111%of labelJun 27, 2025View →
Vertex Labs1 test only99.7%Excellent1 test99.7%105%of labelApr 18, 2026View →
Peptide Crafters99.69%Excellent22 tests99.17–99.96%109%of labelMar 19, 2026View →
Royal Peptides99.68%Excellent3 tests99.41–99.88%112%of labelFeb 6, 2026View →
HkRoids99.68%Excellent5 tests99.16–99.92%106%of labelMar 3, 2026View →
Qing Li Peptide1 test only99.68%Excellent1 test99.68%107%of labelMar 21, 2025View →
AS-XA51 test only99.66%Excellent1 test99.66%116%of labelJul 9, 2026View →
EvoLabs Research1 test only99.65%Excellent1 test99.65%116%of labelJul 29, 2025View →
mspeptides.com99.64%Excellent5 tests99.28–99.88%123%of labelJul 15, 2026View →
Prime Lab Peptides99.63%Excellent2 tests99.4–99.85%117%of labelFeb 3, 2026View →
Trusted Peptides1 test only99.63%Excellent1 test99.63%107%of labelFeb 26, 2026View →
TNN Peptides1 test only99.62%Excellent1 test99.62%113%of labelAug 7, 2025View →
researchchemhq.co99.62%Excellent3 tests99.24–99.83%111%of labelJun 4, 2026View →
ascensionpeptides.com99.61%Excellent2 tests99.25–99.98%111%of labelJun 26, 2026View →
Hydro Research Peptides99.6%Excellent6 tests99.08–99.99%124%of labelApr 17, 2025View →
Grey Market Peptides99.6%Excellent3 tests99.52–99.75%138%of labelFeb 16, 2026View →
Zen Aminos99.6%Excellent4 tests99.23–99.84%104%of labelJun 18, 2026View →
Atomik Labz99.59%Excellent9 tests99.18–99.92%108%of labelFeb 2, 2026View →
Strate Labs1 test only99.58%Excellent1 test99.58%110%of labelJun 23, 2025View →
Peptide Partners99.58%Excellent2 tests99.34–99.82%113%of labelJan 10, 2026View →
KÖLD99.57%Excellent2 tests99.56–99.57%121%of labelMar 4, 2026View →
NELA Peptides99.55%Excellent2 tests99.28–99.82%104%of labelMar 14, 2026View →
Peakform Peptides1 test only99.55%Excellent1 test99.55%103%of labelJan 23, 2026View →
Elite Research USA1 test only99.54%Excellent1 test99.54%102%of labelApr 10, 2026View →
Reta One Labs99.54%Excellent2 tests99.31–99.76%96%of labelFeb 27, 2026View →
Direct Peptides99.53%Excellent2 tests99.19–99.87%124%of labelMar 6, 2026View →
Skye Peptides99.52%Excellent15 tests99.02–99.92%115%of labelDec 31, 2025View →
Lumin Research1 test only99.52%Excellent1 test99.52%122%of labelJan 12, 2026View →
Valor Peptides99.51%Excellent2 tests99.46–99.57%103%of labelFeb 10, 2026View →
Profound Aminos99.51%Excellent12 tests99.17–99.85%113%of labelFeb 17, 2026View →
Growth Guys99.51%Excellent5 tests99.4–99.73%109%of labelAug 7, 2025View →
Oupeptide1 test only99.51%Excellent1 test99.51%100%of labelApr 28, 2025View →
Prime Peptides99.5%Excellent4 tests99.02–99.79%110%of labelApr 10, 2026View →
SRYLAB99.5%Excellent3 tests99.43–99.54%108%of labelAug 11, 2025View →
Trulab Peptides99.5%Excellent2 tests99.42–99.59%114%of labelMay 9, 2026View →
Wolverine Peptides99.47%Excellent2 tests99.03–99.9%110%of labelMay 6, 2024View →
Soma Chems99.46%Excellent9 tests98.63–99.89%122%of labelFeb 16, 2026View →
Polaris Peptides99.46%Excellent7 tests98.27–99.89%117%of labelAug 12, 2025View →
Tydes99.45%Excellent2 tests99.14–99.77%109%of labelFeb 27, 2026View →
Peptide Pro1 test only99.39%Excellent1 test99.39%105%of labelOct 31, 2025View →
Amino Amigos99.39%Excellent7 tests98–99.9%104%of labelDec 17, 2024View →
Disguised Alpha1 test only99.36%Excellent1 test99.36%108%of labelDec 12, 2025View →
Orbitrex Peptides99.35%Excellent5 tests98.31–99.86%115%of labelMar 18, 2026View →
Elutide99.34%Excellent2 tests99.19–99.49%100%of labelMar 27, 2026View →
Purified Peptide1 test only99.33%Excellent1 test99.33%147%of labelFeb 18, 2026View →
ThreeSide Peptides99.32%Excellent2 tests99.26–99.37%101%of labelJan 14, 2026View →
crownwellresearch.com99.32%Excellent2 tests99.22–99.41%108%of labelFeb 3, 2026View →
Pure Health Peptides99.3%Excellent4 tests99–99.84%101%of labelApr 8, 2026View →
Certified Peptides99.28%Excellent3 tests99.01–99.57%110%of labelJan 5, 2026View →
Eternal Peptides1 test only99.19%Excellent1 test99.19%114%of labelDec 2, 2025View →
Liberty Peptides1 test only99.1%Excellent1 test99.1%110%of labelJan 27, 2026View →
Honest Peptide99.07%Excellent2 tests99.06–99.09%108%of labelOct 1, 2025View →
Coastal Peptides99.06%Excellent3 tests98.04–99.84%105%of labelFeb 17, 2026View →
modifiedaminos.shop peptides1 test only99%Excellent1 test99%103%of labelJul 6, 2026View →
Simon's Compounding1 test only98.9%Research grade1 test98.9%102%of labelFeb 25, 2025View →
AS-XA101 test only98.5%Research grade1 test98.5%109%of labelJul 9, 2026View →
Biolabshop1 test only98%Research grade1 test98%105%of labelFeb 13, 2024View →
What is net peptide content — and why isn't purity enough?

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.

See all lab tests for SemaglutideShops selling Semaglutide

Why Purity Matters

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.

What the Purity Numbers Mean

HPLC Purity

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 RangeClassificationTypical Use Case
≥ 99%ExcellentQuantitative research, sensitive assays
98–98.9%Research gradeGeneral research applications
95–97.9%MarginalScreening, preliminary research only
< 95%Below standardNot suitable for most applications

How Peptigrity Collects Lab Test Data

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.

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