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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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160Brands compared
834Tests on file
99.97%Top avg purity
All Tirzepatide lab tests →
Brand / shopAvg HPLC puritySpreadNet contentLast tested
Simple Peptides1 test only99.97%Excellent1 test99.97%107%of labelNov 16, 2025View →
Evolabs Research99.96%Excellent3 tests99.9–99.99%116%of labelMar 31, 2026View →
volterasciences.com1 test only99.96%Excellent1 test99.96%118%of labelMay 17, 2026View →
LuvionBio99.94%Excellent2 tests99.94–99.95%107%of labelOct 28, 2025View →
Pure Peptides99.94%Excellent2 tests99.88–99.99%113%of labelMar 12, 2026View →
Everest Peptides1 test only99.94%Excellent1 test99.94%99%of labelMar 29, 2026View →
1 test only99.93%Excellent1 test99.93%114%of labelOct 3, 2025View →
VRIL Peptides1 test only99.93%Excellent1 test99.93%114%of labelMar 27, 2026View →
Elite Research USA99.93%Excellent2 tests99.88–99.99%113%of labelFeb 4, 2026View →
Prosperity Peptides1 test only99.93%Excellent1 test99.93%162%of labelFeb 21, 2026View →
Alpha Peptides99.93%Excellent3 tests99.9–99.99%110%of labelMay 1, 2026View →
BleauGenics1 test only99.92%Excellent1 test99.92%117%of labelMar 3, 2026View →
Ascension Peptides99.92%Excellent2 tests99.89–99.95%113%of labelFeb 7, 2026View →
Coffee and Peppers99.92%Excellent6 tests99.85–99.96%115%of labelApr 21, 2026View →
NELA Peptides99.91%Excellent7 tests99.78–99.99%103%of labelMar 14, 2026View →
Pure Health Peptides99.91%Excellent5 tests99.86–99.96%111%of labelJan 13, 2026View →
Nextgen Peptides99.91%Excellent2 tests99.89–99.92%105%of labelMay 6, 2026View →
Modern Aminos99.9%Excellent3 tests99.83–99.96%119%of labelMar 10, 2026View →
Omegamino99.9%Excellent2 tests99.88–99.93%117%of labelApr 8, 2026View →
Vylix Research1 test only99.9%Excellent1 test99.9%117%of labelApr 9, 2026View →
Bulk Peptide Supply99.9%Excellent4 tests99.9–99.9%99%of labelAug 12, 2025View →
Vera Peptides1 test only99.9%Excellent1 test99.9%118%of labelApr 7, 2026View →
Rescue Research USA99.9%Excellent2 tests99.82–99.97%111%of labelMay 17, 2026View →
National Science Labs1 test only99.9%Excellent1 test99.9%146%of labelJun 13, 2026View →
Instant Peptides99.89%Excellent14 tests99.5–99.98%101%of labelMar 9, 2026View →
Mile High Compounds99.89%Excellent8 tests99.69–99.96%114%of labelMar 18, 2026View →
NuRev Peptides1 test only99.89%Excellent1 test99.89%99%of labelAug 12, 2025View →
Instant Peptides99.89%Excellent4 tests99.84–99.94%110%of labelMay 20, 2026View →
Blank Peptides99.89%Excellent6 tests99.71–99.98%118%of labelApr 7, 2026View →
AminoForge1 test only99.89%Excellent1 test99.89%100%of labelDec 14, 2025View →
crownwellresearch.com99.89%Excellent2 tests99.88–99.89%122%of labelFeb 14, 2026View →
Soma Chems1 test only99.88%Excellent1 test99.88%138%of labelFeb 16, 2026View →
Reta One Labs99.88%Excellent8 tests99.8–99.96%108%of labelMay 13, 2026View →
Rivn Research1 test only99.88%Excellent1 test99.88%100%of labelApr 5, 2026View →
americanpeptides.us99.88%Excellent5 tests99.8–99.9%104%of labelJul 7, 2026View →
Peptira99.87%Excellent16 tests99.61–99.97%110%of labelNov 30, 2025View →
Trusted Peptides1 test only99.87%Excellent1 test99.87%112%of labelNov 20, 2025View →
Peptide Pro Canada99.87%Excellent3 tests99.79–99.91%109%of labelJun 3, 2026View →
Chimera Peptides1 test only99.87%Excellent1 test99.87%105%of labelNov 27, 2025View →
GLP-2 TZ99.87%Excellent2 tests99.83–99.91%114%of labelJun 21, 2026View →
OROS Research99.86%Excellent2 tests99.84–99.87%106%of labelJul 4, 2025View →
MyPure Peptide99.86%Excellent2 tests99.82–99.9%102%of labelJul 9, 2025View →
utherpeptide.com1 test only99.86%Excellent1 test99.86%105%of labelSep 16, 2025View →
NEXAPH1 test only99.85%Excellent1 test99.85%119%of labelFeb 16, 2026View →
Research Ready Peptides99.85%Excellent3 tests99.68–99.97%100%of labelOct 28, 2024View →
IRON Peptides99.85%Excellent3 tests99.64–99.98%112%of labelJan 15, 2026View →
Riptide Wellness1 test only99.85%Excellent1 test99.85%97%of labelNov 22, 2025View →
Aavant (ACR)99.85%Excellent3 tests99.75–99.95%112%of labelMay 27, 2026View →
Hydro Research Peptides99.84%Excellent9 tests99.56–99.98%106%of labelDec 12, 2025View →
Simple Peptide99.84%Excellent12 tests99.2–99.98%109%of labelDec 19, 2025View →
Tydes99.84%Excellent5 tests99.78–99.93%109%of labelJan 27, 2026View →
Glacier Aminos99.84%Excellent12 tests99.09–99.99%107%of labelMar 24, 2026View →
Lab Trust Peptides1 test only99.84%Excellent1 test99.84%99%of labelJun 10, 2024View →
Research Peptides Lab99.84%Excellent5 tests99.75–99.92%100%of labelJan 1, 2025View →
BulkGLP1 test only99.84%Excellent1 test99.84%109%of labelMay 23, 2026View →
AMP99.84%Excellent5 tests99.73–99.94%115%of labelJun 3, 2026View →
lapeptides.net99.84%Excellent10 tests99.57–99.99%105%of labelJun 15, 2026View →
Prime Lab Peptides99.83%Excellent3 tests99.74–99.87%110%of labelMar 20, 2026View →
GoAlpha Labs1 test only99.83%Excellent1 test99.83%97%of labelJan 23, 2026View →
PeptidePlugs1 test only99.83%Excellent1 test99.83%96%of labelFeb 27, 2026View →
Peptide Hackers99.83%Excellent2 tests99.78–99.89%114%of labelApr 16, 2026View →
saiyanmed.com99.83%Excellent2 tests99.81–99.84%102%of labelFeb 5, 2026View →
honestpeptide.com99.83%Excellent3 tests99.69–99.94%112%of labelJun 15, 2026View →
IonPeptide99.82%Excellent16 tests99.47–99.97%101%of labelMar 16, 2026View →
Penguin Peptides99.81%Excellent7 tests99.62–99.9%107%of labelJan 20, 2026View →
Qing Li Peptide1 test only99.81%Excellent1 test99.81%102%of labelMar 20, 2025View →
PEPTIDE Power1 test only99.81%Excellent1 test99.81%111%of labelNov 4, 2025View →
Licensed Peptides99.8%Excellent7 tests99.8–99.8%98%of labelFeb 19, 2026View →
HPR1 test only99.8%Excellent1 test99.8%111%of labelDec 3, 2025View →
Pura Peptide99.8%Excellent19 tests99.59–99.98%112%of labelJul 6, 2026View →
Peptidology99.8%Excellent4 tests99.8–99.8%103%of labelApr 6, 2026View →
Prime Peptides99.8%Excellent3 tests99.66–99.9%100%of labelFeb 16, 2026View →
Crush Research Supply99.8%Excellent3 tests99.58–99.93%109%of labelFeb 25, 2026View →
VANDL Labs1 test only99.8%Excellent1 test99.8%95%of labelMar 30, 2026View →
Grey Market Peptides99.8%Excellent3 tests99.68–99.88%168%of labelFeb 16, 2026View →
Good Science99.8%Excellent2 tests99.8–99.8%103%of labelMay 27, 2026View →
Research Peptides Europe1 test only99.8%Excellent1 test99.8%103%of labelMar 2, 2026View →
Excalibur Peptides1 test only99.8%Excellent1 test99.8%112%of labelMay 18, 2026View →
adriascience.com99.8%Excellent3 tests99.8–99.8%94%of labelJun 22, 2026View →
Vertex Labs1 test only99.8%Excellent1 test99.8%101%of labelApr 21, 2026View →
mspeptides.com99.8%Excellent6 tests99.67–99.91%113%of labelJun 24, 2026View →
cosmicpeptides.com99.8%Excellent3 tests99.8–99.8%105%of labelFeb 26, 2026View →
Empower Peptides99.79%Excellent12 tests98.65–99.98%109%of labelApr 29, 2026View →
Peptide Supply Co99.79%Excellent4 tests99.62–99.95%106%of labelFeb 24, 2026View →
HkRoids99.79%Excellent11 tests99.4–99.96%110%of labelMar 3, 2026View →
aavantpeptides.com99.79%Excellent8 tests99.53–99.88%111%of labelMar 24, 2026View →
ezpeps.com99.79%Excellent19 tests99.47–99.95%112%of labelJul 9, 2026View →
Peptide Pro Shop1 test only99.78%Excellent1 test99.78%99%of labelNov 10, 2025View →
Honest Peptide99.78%Excellent2 tests99.69–99.86%108%of labelOct 1, 2025View →
Skye Peptides99.77%Excellent38 tests99.42–99.99%110%of labelJan 26, 2026View →
Adonis Research99.77%Excellent11 tests99–99.98%110%of labelJul 30, 2025View →
SRYLAB99.77%Excellent11 tests99.64–99.96%114%of labelAug 29, 2025View →
Profound Aminos99.77%Excellent46 tests98.39–99.98%113%of labelMay 21, 2026View →
KÖLD99.77%Excellent2 tests99.75–99.79%109%of labelMar 31, 2026View →
ezpeptides.com99.77%Excellent5 tests99.68–99.92%115%of labelJun 3, 2026View →
ascensionpeptides.com99.77%Excellent4 tests99.44–99.95%109%of labelJun 21, 2026View →
Certified Peptides99.76%Excellent3 tests99.67–99.8%101%of labelFeb 23, 2026View →
Panda Peptides1 test only99.76%Excellent1 test99.76%113%of labelMar 6, 2026View →
Purity Peptides1 test only99.76%Excellent1 test99.76%103%of labelApr 30, 2026View →
Nextday Sciences1 test only99.76%Excellent1 test99.76%109%of labelDec 2, 2025View →
Zen Aminos99.76%Excellent26 tests99.09–99.97%104%of labelJun 4, 2026View →
Power Peptides99.75%Excellent2 tests99.63–99.87%104%of labelJun 24, 2025View →
Thrive Peptides99.75%Excellent2 tests99.64–99.85%114%of labelFeb 11, 2026View →
Felix Chemical Supply99.75%Excellent38 tests98.51–99.99%107%of labelFeb 17, 2026View →
Growth Guys99.75%Excellent7 tests99.33–99.9%110%of labelJan 7, 2026View →
Petratide Science99.75%Excellent12 tests99.37–99.93%106%of labelMay 30, 2026View →
modernresearchpeptides.net99.74%Excellent9 tests99.16–99.99%110%of labelJun 24, 2026View →
EZP99.74%Excellent3 tests99.69–99.8%117%of labelJun 3, 2026View →
globalaminos.com peptides99.74%Excellent3 tests99.63–99.84%110%of labelJun 7, 2026View →
Peptidic99.73%Excellent3 tests99.59–99.88%118%of labelNov 24, 2025View →
Peptide Crafters99.73%Excellent32 tests99.43–100%108%of labelFeb 27, 2026View →
AS-TZ101 test only99.73%Excellent1 test99.73%103%of labelJul 9, 2026View →
Injectify1 test only99.72%Excellent1 test99.72%108%of labelJan 8, 2026View →
Royal Peptides99.72%Excellent16 tests99.17–99.99%111%of labelFeb 10, 2026View →
Disguised Alpha99.72%Excellent4 tests99.6–99.78%114%of labelApr 26, 2026View →
Midwest BioResearch1 test only99.72%Excellent1 test99.72%101%of labelMay 12, 2026View →
Purified Peptide99.71%Excellent3 tests99.65–99.78%110%of labelFeb 18, 2026View →
biopeptitech.com99.71%Excellent3 tests99.5–99.88%117%of labelJul 6, 2026View →
Polaris Peptides99.7%Excellent28 tests98.93–99.99%112%of labelMar 12, 2026View →
Atomik Labz99.7%Excellent20 tests99.4–99.92%114%of labelFeb 2, 2026View →
Peptide Pro99.7%Excellent2 tests99.7–99.7%103%of labelMar 9, 2026View →
Gentleman Peptides1 test only99.7%Excellent1 test99.7%104%of labelFeb 12, 2026View →
Peptide Partners99.69%Excellent3 tests99.41–99.87%106%of labelMar 27, 2026View →
BetterBio Synthesis1 test only99.69%Excellent1 test99.69%100%of labelMay 23, 2025View →
Peptide Koning99.69%Excellent5 tests99.36–99.92%109%of labelFeb 18, 2026View →
Nova Peptide Supply99.68%Excellent6 tests99.4–99.87%110%of labelApr 9, 2026View →
NuScience Peptides99.67%Excellent4 tests99.14–99.97%113%of labelFeb 12, 2026View →
perfectpeptides.com99.67%Excellent4 tests99.24–99.84%109%of labelMay 30, 2026View →
EvoLabs Research99.66%Excellent5 tests99.39–99.85%105%of labelDec 1, 2025View →
Neovia Peptides99.66%Excellent2 tests99.56–99.76%103%of labelSep 18, 2025View →
Peakform Peptides1 test only99.66%Excellent1 test99.66%114%of labelJan 23, 2026View →
AS-TZ601 test only99.65%Excellent1 test99.65%103%of labelJul 9, 2026View →
Valor Peptides99.64%Excellent4 tests99.42–99.8%115%of labelMay 15, 2026View →
Elutide99.64%Excellent4 tests99.42–99.89%104%of labelApr 24, 2026View →
researchchemhq.co99.64%Excellent4 tests99.1–99.85%105%of labelJun 4, 2026View →
NextGen Peptides99.63%Excellent13 tests98.83–99.89%114%of labelFeb 19, 2026View →
Life Peptide1 test only99.62%Excellent1 test99.62%99%of labelJun 4, 2026View →
onedaycompounds.com99.62%Excellent9 tests99–99.82%102%of labelMay 23, 2026View →
SRY99.61%Excellent2 tests99.44–99.77%105%of labelMay 7, 2025View →
Next Generation Compounds1 test only99.6%Excellent1 test99.6%108%of labelJan 23, 2026View →
Lumin Research1 test only99.59%Excellent1 test99.59%138%of labelJan 7, 2026View →
Synthesis Peptides99.58%Excellent5 tests99.13–99.87%120%of labelMay 8, 2026View →
Humatide1 test only99.58%Excellent1 test99.58%106%of labelJun 27, 2026View →
Loti Labs99.56%Excellent2 tests99.36–99.75%117%of labelFeb 5, 2026View →
Wolverine Peptides99.56%Excellent5 tests98.8–99.96%110%of labelMar 31, 2026View →
Kensington Labs1 test only99.54%Excellent1 test99.54%118%of labelSep 11, 2025View →
studzpeptides.com99.51%Excellent5 tests99.21–99.9%107%of labelJun 28, 2026View →
Amino Amigos99.5%Excellent16 tests98.09–99.98%112%of labelMar 20, 2025View →
Chameleon Peptides99.49%Excellent2 tests99.21–99.76%107%of labelMar 6, 2026View →
Peppy&Me99.45%Excellent5 tests99–99.8%111%of labelApr 28, 2026View →
blueskypeptide.com1 test only99.44%Excellent1 test99.44%—Jun 18, 2026View →
Direct Peptides99.43%Excellent3 tests99.34–99.51%103%of labelMar 14, 2026View →
Alpha Carbon Labs1 test only99.4%Excellent1 test99.4%101%of labelDec 2, 2025View →
modifiedaminos.shop peptides99.4%Excellent2 tests99–99.8%99%of labelJun 8, 2026View →
Coastal Peptides99.37%Excellent6 tests99.03–99.95%109%of labelJan 13, 2026View →
Oupeptide99.36%Excellent2 tests99.35–99.37%106%of labelApr 28, 2025View →
Eternal Peptides1 test only99.27%Excellent1 test99.27%107%of labelDec 2, 2025View →
Evolve BioPep99.07%Excellent6 tests98–99.8%107%of labelMay 21, 2026View →
Xeno Peptides1 test only98.42%Research grade1 test98.42%112%of labelOct 6, 2025View →
Real Peptides1 test only98.13%Research grade1 test98.13%91%of labelDec 15, 2025View →
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 TirzepatideShops selling Tirzepatide

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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