Third-Party Testing You Can Verify & Trust
Accurate Certificates of Analysis for supplements, peptides, cosmetics, and raw materials. Ship us your sample — we handle the rest.
Most Requested Tests
The panels our clients order most — ready to submit today.
Semaglutide (GLP-1)
Purity + Identity + NPC
Tirzepatide (GLP-1)
Purity + Identity + NPC
BPC-157
Purity + Identity + Endotoxin
Human Growth Hormone (HGH)
Purity + Identity + Dimer
Supplement Label Claim
Potency + Heavy Metals + Microbial
Raw Material / API
Identity + Purity Assay
How It Works
From sample submission to certified results in days, not weeks.
Complete Intake Form
Download and fill out our sample submission form. Takes under 2 minutes.
Ship Your Sample
Ship your labeled vials to our lab. Card is never charged until we receive your sample.
Laboratory Analysis
HPLC, Mass Spectrometry, and certified methods. Rigorous QC at every step.
Receive Your COA
Get a tamper-proof Certificate of Analysis. Shareable, verifiable, trusted by your customers.
State-of-the-Art Analysis, Every Sample
Every sample receives dual-method verification — HPLC for purity quantification and Mass Spectrometry for identity confirmation. This is not optional at Gold Standard Analytics. It's our standard.
What We Test
Comprehensive analytical testing across the supplement, peptide, and cosmetics industries.
Peptides & GLP-1s
HPLC purity, MS identity confirmation, net peptide content, TFA quantification.
Dietary Supplements
Label claim verification, potency, heavy metals, microbial contamination screening.
Cosmetics & Skincare
Preservative efficacy, stability testing, toxin screening, pH and solubility assays.
Raw Materials & APIs
Compound identity, moisture content, purity assay, certificate of conformance.
Safety & Harm Reduction
Sterility testing, endotoxin (LAL), heavy metals panel, residual solvents.
GLP-1 Peptide Testing
Specialized testing for Semaglutide, Tirzepatide, Retatrutide, and all GLP-1 agonists.
Don't see your compound? Contact us — our testing capabilities extend well beyond this list.
Transparent Pricing
No hidden fees. No surprises. Pricing scales with the complexity of the test panel.
Single compound, HPLC purity percentage. Ideal for verifying raw material or bulk API.
- HPLC Purity %
- Single compound
- Digital COA
- COA lookup listing
- 5–7 day turnaround
HPLC purity combined with MS identity confirmation. The industry standard for peptides and supplements.
- HPLC Purity %
- MS Identity Confirmation
- Net Content Analysis
- Digital COA
- Public COA verification
- 5–7 day turnaround
Complete analysis including purity, identity, endotoxin, heavy metals, and safety profile.
- Everything in Purity + Identity
- Endotoxin (LAL) Testing
- Heavy Metals Screen
- Microbial / Sterility
- Priority turnaround
- Certificate of Conformance
Need custom panels, bulk pricing, or expedited testing?
Contact us for a custom quote →Verify a Certificate of Analysis
Every COA we issue includes a unique accession number. Use our public lookup tool to verify authenticity — trusted by vendors, buyers, and compliance teams worldwide.
15,000+ PUBLIC COAs AVAILABLE
What Our Clients Say
Trusted by supplement brands, peptide suppliers, and research companies.
“Gold Standard turned around results in under a week with HPLC + MS confirmation. The COA is clean, professional, and our clients trust it immediately.”
“We've tested with three labs before. None came close on communication and turnaround speed. Will not use anyone else going forward.”
“The COA verification link we send customers has completely eliminated quality complaints. Absolute game changer for our supplement brand.”
“Getting cosmetic ingredients tested used to be a nightmare. GSA made it simple — intake form, ship, done. Results were back in 5 days.”
“Endotoxin + sterility testing handled fast and professionally. The report format is exactly what our customers need to see.”
“ISO-compliant purity testing at a fair price. The team answered every question we had. Our COAs are trusted by our entire distributor network.”
Why Gold Standard Analytics
Fast Turnaround
Results in 5–7 business days. Expedited options available for urgent testing.
Verified Accuracy
HPLC and Mass Spectrometry on every sample. Dual-method verification is our standard.
Client Privacy
Your data and results are confidential. We never share or sell client information.
Worldwide Service
We accept samples from clients globally. Clear shipping instructions provided on submission.
From Sample Receipt to COA
Here's what happens after your sample arrives at our lab.
Sample logged, labeled, and assigned an accession number.
Sample is prepared per protocol. QC checks initiated.
Purity quantification and component separation.
Identity confirmed via mass spectrometry.
Final report reviewed, signed, and delivered to client.
Frequently Asked Questions
Everything you need to know before submitting your first sample.
Q.What is a Certificate of Analysis (COA) and why do I need one?
A COA is an official document issued by an independent laboratory that certifies the purity, identity, potency, and safety of a product. If you sell supplements, peptides, or cosmetics, a third-party COA proves to your customers, distributors, and regulators that your product contains exactly what it claims — and nothing it shouldn't. Without a COA from an accredited independent lab, you have no verifiable proof of quality.
Q.How do I get my peptides tested for purity?
It's a 4-step process: (1) Download our intake form and fill out your sample details — takes under 2 minutes. (2) Authorize payment via our secure portal — your card is not charged until we receive your sample. (3) Ship your labeled vials to our Houston, TX lab. (4) Receive your HPLC + MS Certificate of Analysis in 5–7 business days, complete with a public accession number your customers can verify.
Q.How much does third-party supplement or peptide testing cost?
Purity-only HPLC testing starts at $149. Our most popular panel — Purity + Identity (HPLC + Mass Spectrometry) — starts at $249. Full panels including endotoxin, heavy metals, and microbial screening start at $449. Bulk discounts apply for 5+ samples. Contact us for a custom quote on multi-compound or contract testing.
Q.Do you test Semaglutide, Tirzepatide, and other GLP-1 peptides?
Yes — GLP-1 peptide testing is one of our most requested services. We provide HPLC purity, mass spectrometry identity confirmation, net peptide content, and TFA quantification for Semaglutide, Tirzepatide, Retatrutide, and all common GLP-1 receptor agonists. With the rapid growth of GLP-1 peptide vendors, a verified third-party COA is essential for credibility and customer safety.
Q.How can I tell if a COA is real or has been fabricated?
A legitimate COA from Gold Standard Analytics includes a unique accession number that you can verify at goldstandardanalytics.com/coa-lookup. If the number doesn't appear in our public database, the document is not genuine. Fabricated COAs are a known problem in the peptide industry — always verify using the lab's own verification tool, not just the PDF.
Q.What is HPLC testing and what does it actually measure?
HPLC (High-Performance Liquid Chromatography) separates the components in your sample and measures how much of each is present. For a peptide, it returns a purity percentage — for example, '98.4% pure' means 98.4% of the sample is the target compound, with 1.6% being impurities or degradation products. HPLC is the gold standard for purity quantification and is required on all COAs we issue.
Q.What is net peptide content (NPC) and why does it matter?
Net Peptide Content (NPC) measures the actual active peptide mass as a percentage of the total sample weight — accounting for TFA salt, moisture, and other counter-ions that add mass but are not the peptide itself. A vial labeled '10mg' might only contain 7–8mg of actual peptide if NPC is not accounted for. NPC testing ensures your customers know the true active dose they are receiving.
Q.How long does peptide or supplement testing take?
Standard turnaround is 5–7 business days from the day we receive your physical sample. Expedited testing (2–3 business days) is available on request. The clock starts when your sample arrives at our lab, not when you place the order — so fast shipping helps. We notify you by email when your sample is received and again when your COA is ready.
Q.What is endotoxin testing and do my peptides need it?
Endotoxin testing (LAL assay) detects bacterial endotoxins — toxic byproducts from gram-negative bacteria that can cause dangerous inflammatory reactions if injected. If your peptides are intended for injection or are being sold to customers who may inject them, endotoxin testing is critical. Our LAL assay provides a numeric EU/mL value with a clear pass/fail result.
Q.Can my customers verify my COA directly?
Yes — and this is one of the most powerful trust-building features we offer. Every COA issued by Gold Standard Analytics is listed in our public database at goldstandardanalytics.com/coa-lookup. Your customers can enter the accession number from their COA and instantly confirm it was issued by our lab, view the original results, and verify it hasn't been altered. This completely eliminates the possibility of you providing a fabricated COA.
Q.Do you test cosmetic ingredients and skincare products?
Yes. We test cosmetic actives, serums, creams, and raw cosmetic ingredients for purity, stability, preservative efficacy, toxin content, pH, and solubility. Whether you're a formulator verifying an ingredient supplier or a brand needing third-party documentation for retail or regulatory purposes, we can provide the testing and COA documentation you need.
Q.Do you accept samples from outside the United States?
Yes — we accept samples from clients worldwide. After you submit your intake form, we provide detailed international shipping instructions including carrier recommendations, packaging requirements, and any import documentation needed. Our lab is located in Houston, TX, and we regularly receive samples from clients in Europe, Canada, Australia, and beyond.
Still have questions? Send us a message — we respond within 24 hours.
Ready for absolute certainty?
Join supplement brands, peptide suppliers, and cosmetic companies who trust Gold Standard Analytics for third-party compliance testing.
Get In Touch
Questions about testing, turnaround times, or custom panels? We respond within 24 hours.
Mon–Fri, 9am–5pm CT
This is a UPS mailbox for correspondence and sample intake. We do not publicly disclose our operating lab location for privacy and security reasons.