Peptide testing labs compared: tests, identity methods, turnaround and verification for 19 labs

How we compared the labs

This page compares 19 labs that test peptides for buyers, group-test organisers and sellers. It covers the tests each lab lists, how its reports show identity, how it reports endotoxin and what it calls sterility, its published turnaround, and how you check that a report is genuine. Every cell comes from the lab’s own website or from public reports we read, checked on 23 and 24 September 2026 (Freedom Diagnostics’ turnaround was re-read on 3 October 2026).

Read the tables with four points in mind. “Not published” means we could not find the fact; the lab may still do it. A cell says what a lab’s pages and reports show; it does not say whether its numbers are right. There are no prices or scores here: published prices are in peptide testing cost. Accreditation is left out too, because what counts is whether a lab’s scope covers the peptide test you order; ISO/IEC 17025 and peptides explains how to check. More labs in Europe, Canada and Australia are listed in where to test peptides, and counts, prices and methods across 47 labs are in the peptide testing market in 2026.

Tests offered and identity method

Lab (where)	Peptide tests listed	Identity, as shown on reports or site
Janoshik (Czech Republic)	Content (mg) and purity by HPLC; blind GLP-1 test; add-ons include endotoxin, microbial count, TFA, raw data, vial variance	Peptide named; no identity evidence on the report
Freedom Diagnostics (Tennessee)	Purity (HPLC), identity (LC-MS), net content, endotoxin, PCR microbial screen, conformity, fentanyl screen, pH	Mass spectrum image; no expected mass or error
Vanguard Laboratory (Washington)	Purity, quantity, identity, solubility; panels add endotoxin, bioburden, fentanyl, seal integrity; options include USP <71>, conformity, TFA, residual solvents	Retention time against a reference standard (HPLC-UV)
Krause Analytical (Texas)	Purity, potency and identity by HPLC-UV and HPLC-MS; add-ons include residual solvents, USP <71>, endotoxin	LC-MS spectrum; no expected mass or error
MZ Biolabs (Arizona)	Identity, purity and quantity by HPLC-UV and mass spectrometry; endotoxin (USP <85>)	Expected and measured mass
Chromate (New Hampshire)	HPLC analysis per compound; sterility culture; endotoxin; extra-vial variance	Retention time (HPLC-UV)
TrustPointe Analytics (Michigan)	Assay (identity, mg, purity); USP <71>; USP <85>; USP <61>; USP <905> uniformity; Karl Fischer water; pH	Retention time plus UV spectral match
ILS Laboratories (California)	HPLC purity and quantity; endotoxin; rapid sterility screen; fentanyl screen	Retention time against a reference; LC-MS identity as an add-on
BTLabs (Florida)	Purity and potency (HPLC); identity (HPLC, LC-MS, FT-IR); endotoxin; sterility; microbial limits	HPLC, LC-MS or FT-IR, as listed on its site (no public reports read)
BioRegen (US)	Purity and identity by UPLC-MS; net content add-on; pH; endotoxin	Mass spectrum; no expected mass
Bioviridian (Texas)	Identity, purity and net peptide content; endotoxin; USP <71>	MALDI mass spectrum; no expected mass
Ethos Analytics (Arizona)	HPLC assay (mg per vial) and purity; identity; endotoxin; microbial limits (as on its reports)	Retention time (USP <621>)
Accumark Labs (California)	Identity, purity, quantity; endotoxin; PCR microbial screen; USP <71>; fentanyl screen; vial variance	Retention time (HPLC); LC-MS listed as in development
ACS Peptide Testing Labs (Florida)	RP-HPLC purity; LC-MS/MS identity; endotoxin; residual solvents; Karl Fischer water; stability	Mass spectrum (scan)
PharmLabs (California)	Potency and purity (HPLC-DAD); endotoxin; microbial count (TAMC and TYMC); residual solvents	Retention time against a reference standard; no mass spectrometry
MDx BioAnalytical (Texas)	Identity, purity and net peptide content (HPLC with triple-quad MS); endotoxin; microbial tests; residual solvents; Karl Fischer water	ESI mass spectrum with charge labels
Horizon Analytical (Colorado)	Purity, identity and quantity (HPLC/MS); endotoxin; sterility (outsourced); blends	One negative-mode ion; no expected mass
SideChain Analytics (Ontario)	Identity, purity and net content by LC-MS/MS; endotoxin; blends per component	MRM transitions (triple quad)
Ozcanium Analytics (Australia)	Identity, purity and mg by LC-MS/MS and UPLC-UV; endotoxin; vial variance; blind GLP-1	Monitored and detected ions

Endotoxin, sterility, turnaround and verification

Lab	Endotoxin	What it lists as sterility	Published turnaround	How you check a report
Janoshik	LAL, in EU per vial	Microbial count (TAMC and TYMC), pass or fail, 14 days	Average 7 business days	Task number and key on the lab’s site; QR code
Freedom Diagnostics	LAL (USP <85>), pass or fail, 2 replicates	PCR screen for microbial DNA	Average 1–3 business days, from accessioning	Public lookup by company name or code; QR to the PDF
Vanguard Laboratory	Alone or in the Gold panel	USP <71>, 14 days, as an option	Confirmed by the lab per order	Search by report number on the lab’s hub (reports the client made public)
Krause Analytical	LAL (USP <85>) add-on	USP <71>, 14 days, add-on	Not published on its site	Upload form; the lab replies by email
MZ Biolabs	USP <85>	USP <71> announced for early 2025; not confirmed since	Not published	QR on 2026 reports; no lookup page
Chromate	Kinetic chromogenic LAL, in EU	Membrane filtration and incubation per USP <71>, per its services page	Not stated as a figure	Job number and access code
TrustPointe Analytics	USP <85>	USP <71> (14–21 day lead)	3–5 business days; microbiology 10–21 days	QR and key on the lab’s LIMS
ILS Laboratories	Kinetic LAL (USP <85>)	DNA microarray screen, not USP <71>	About 1 week; rush 3 business days	QR and access code; public change history
BTLabs	Offered	Offered; method not stated	Not published	No public lookup; results in a client portal
BioRegen	Kinetic chromogenic LAL; spike recovery on every run	Not offered	Not published	COA number and validation key
Bioviridian	LAL or rFC	USP <71>, 2 vials	3–5 business days (under 20 samples); expedited 1–2	COA number lookup
Ethos Analytics	Gel-clot LAL (USP <85>)	Microbial limits (USP <61>, <62>), not USP <71>	Not stated as a figure	Company name and sample ID
Accumark Labs	LAL, in EU/mL	PCR screen add-on; USP <71>, 14 days	48–72 hours after acceptance; USP <71> 14 days	Code lookup; live report link
ACS Peptide Testing Labs	Kinetic chromogenic LAL (USP <85>)	Not listed	9–11 business days	QR to the lab’s copy; no search page found
PharmLabs	Offered	Microbial count (TAMC and TYMC)	3–5 business days; full panel 5–7	QR code on the report
MDx BioAnalytical	Gel-clot and kinetic turbidimetric LAL	Sterility marketed; listed methods are bioburden and microbial counts	Not published	Public search by code
Horizon Analytical	LAL	Outsourced; 16 days listed	Price list: 5–7 days, rush 1 day; site text: 48–96 hours	Report number, with optional lot
SideChain Analytics	Kinetic chromogenic LAL	Not offered	Typically 5–7 business days	Report number, sample ID and code; QR
Ozcanium Analytics	Offered; reports list instrument, cartridge, dilution and standard curve	Not offered	4–10 business days typical	Code lookup

What the tables show

Three ways to show identity

Seven labs show identity by HPLC retention time, sometimes with a UV spectrum match: Vanguard, Chromate, TrustPointe, ILS, Ethos, Accumark and PharmLabs. Retention time alone is not specific, because similar peptides elute close together. Seven labs print a mass spectrum without the expected mass: Freedom Diagnostics, Krause, BioRegen, Bioviridian, ACS, MDx and Horizon. That shows mass spectrometry was run, but the report gives you no expected value to compare against. SideChain lists the MRM transitions it monitored on a triple-quad instrument. MZ Biolabs and Ozcanium print expected and measured values side by side, which a buyer can check with a calculator. Janoshik’s reports name the peptide without showing identity evidence. Why mass matters: LC-MS identity.

“Sterility” covers several different tests

Six labs list the compendial USP <71> test, which incubates the sample for at least 14 days: Vanguard, Krause, TrustPointe, Accumark, Bioviridian and Chromate. A Chromate report we read cited USP <1223>, the chapter on alternative methods, so ask Chromate which method it will run. Janoshik and PharmLabs list microbial counts (TAMC and TYMC). Freedom Diagnostics and Accumark list PCR screens, and ILS a DNA microarray screen. Ethos and MDx list microbial limit and bioburden tests. Horizon outsources its sterility test, and BTLabs does not state a method. BioRegen, ACS, SideChain and Ozcanium list no sterility test. Each answers a different question; only USP <71> is a sterility test in the pharmacopeial sense. More: which labs run a 14-day sterility test.

Verification ranges from email to random keys

Janoshik, Chromate, BioRegen and SideChain ask for a report number plus a key or code printed on the report. TrustPointe, ILS, Accumark and Ozcanium use a code or QR token printed on the report. Ethos asks for the company name and the sample ID. Freedom Diagnostics, Bioviridian, MDx and Horizon look reports up by number or company name. Vanguard’s hub lists only reports the client made public. Krause answers an upload form by email. MZ Biolabs, PharmLabs and ACS print QR codes on their reports. BTLabs delivers results in a client portal; we found no public lookup. Step by step: how to verify a peptide COA.

Turnaround

Published standard times run from an average of 1–3 business days (Freedom Diagnostics) and 48–72 hours after acceptance (Accumark) to 9–11 business days (ACS). Seven labs publish no figure, and Vanguard confirms turnaround per order. Where the clock starts differs too: how long peptide testing takes.

What each lab does well

• Janoshik: a blind GLP-1 test, key-based verification, and a vial photo on its verify page.
• Freedom Diagnostics: says it never issues HPLC purity without LC-MS identity, publishes an average turnaround, and includes a vial photo.
• Vanguard Laboratory: offers the 14-day USP <71> test and photographs the vial with the lab’s own label in frame.
• Krause Analytical: reports with chromatogram, mass spectrum and a methods section; USP <71> and USP <85> add-ons; method answers published on Finnrick.
• MZ Biolabs: expected and measured mass on the report, from QTOF instruments.
• Chromate: a full public per-compound list of tests and a job-number and access-code check.
• TrustPointe Analytics: system-suitability values and a co-elution check on every result.
• ILS Laboratories: a public change history on its verified report pages, and bulk QR codes for labels.
• BTLabs: lists identity by more than one method (HPLC, LC-MS and FT-IR).
• BioRegen: says it runs spike recovery on every endotoxin run and prints the cartridge lot.
• Bioviridian: USP <71> on its standard menu and a vial photo on the report.
• Ethos Analytics: HPLC assay against a certified reference standard and a public verify page.
• Accumark Labs: live report links from its LIMS with an interactive chromatogram, and USP <71> alongside its PCR screen.
• ACS Peptide Testing Labs: full-run chromatograms with each peak labelled, and a form number and version on each report.
• PharmLabs: expanded measurement uncertainty at 95% confidence and a published LOD and LOQ for each peptide.
• MDx BioAnalytical: net peptide content and a public certificate search.
• Horizon Analytical: a prepaid shipping label at order and reports private by default.
• SideChain Analytics: states the salt form and reports blends per component.
• Ozcanium Analytics: lists the ions it monitored and detected for identity, and gives method detail on its endotoxin page.

Finnrick and large contract labs such as Eurofins

Finnrick is a testing service that works through partner labs. It anonymises vials sent in by buyers and vendors, passes them to those labs and publishes community test results. Its labs page lists nine labs; four could be ordered through it when we checked: Krause Analytical, BTLabs, Ichor Life Sciences and PharmLabs. Krause has run 6,372 of Finnrick’s published tests, about 61% of the total. How Finnrick and the other rating sites score labs: peptide rating sites compared. Large contract labs such as Eurofins appear in some lab lists, but they did not show up as labs marketing peptide testing to individual buyers in our September 2026 research.

How to choose the best lab for your question

No lab in these tables leads on every row.

• Start from your question: identity, mg per vial, contamination or batch consistency. Then shortlist labs whose tests and identity method answer it.
• Ask each shortlisted lab for a sample report and run it through the 12 checks.
• Check that your seller or group accepts the lab’s results.
• Verify any report you receive on the lab’s own site.

Where HK Analytical fits

On these rows, our identity test is LC-MS, and the report compares the measured mass of the peptide with its expected mass (identity by LC-MS). Every number comes with its raw data. Our sterility test is Sterility (USP <71>, 14 days). Each report is a signed record with a private link that you can check at hkanalytical.com/verify. It carries our own photo of the vial as received and states, inside the signed record, how the client is related to HK Analytical. A correction makes a new version, and the old one is marked superseded. Results within days of receipt. Sterility (USP <71>, 14 days) is the one test that takes 14 days, because the method incubates for 14 days. We do not hold ISO/IEC 17025 accreditation. Our sourced comparison with five of these labs is on how we compare, and the example report shows our format.