Lab directory

GLP-1 and HGH testing panels, instruments, and turnaround

One independent lab, four verified panels. Each entry lists the instrumentation behind the result, the standard turnaround, and how mail-in submission works — plus the criteria worth checking before you trust any peptide testing lab.

CertikLabs · Accreditation in progress — target 2027

HGH (somatropin) verification panel

Recombinant human growth hormone (somatropin, 191-aa)

Recombinant protein verification focused on the failures buyers actually see: substituted secretagogues, aggregation from cold-chain breaks, host-cell protein, and endotoxin.

Instrumentation

RP-HPLC purity
LC-HRMS intact-mass identity
SEC-HPLC dimer / aggregate analysis
Tryptic peptide mapping (sequence confirmation)
Host-cell protein ELISA
Bacterial endotoxin (LAL / rFC)

Turnaround

Standard: 5–10 business days

Rush: 24–72 hours (quoted per submission)

From $299 per batch (purity only)

Submission

Mail-in submission (nationwide and international)
Tracked chain of custody from receipt to report
One sealed vial per batch is sufficient for the standard panel

HGH testing cost breakdown HGH testing methodology HGH buyer's guide

Semaglutide verification panel

Semaglutide (GLP-1 analog, CAS 910463-68-2)

Lipidated-analog verification: intact mass confirms the fatty-diacid side chain that generic HPLC labs routinely miss, plus content per vial and impurity screening.

Instrumentation

RP-HPLC purity
LC-HRMS identity (side-chain confirmation)
Quantitative content (mg per vial)
Synthesis-impurity screening (deletion sequences, analog swaps)
Bacterial endotoxin (LAL / rFC) — add-on

Turnaround

Standard: 5–10 business days

Rush: 24–72 hours (quoted per submission)

Per-test pricing published on the cost guide

Submission

Mail-in submission (nationwide and international)
Tracked chain of custody from receipt to report
One sealed vial per batch is sufficient for the standard panel

Semaglutide testing cost breakdown GLP-1 buyer's guide Semaglutide reference

Tirzepatide verification panel

Tirzepatide (GIP/GLP-1 dual agonist)

Dual-agonist verification with the same lipidated-analog requirements as semaglutide: side-chain identity, overstated-content checks, and analog-swap screening.

Instrumentation

RP-HPLC purity
LC-HRMS identity (side-chain confirmation)
Quantitative content (mg per vial)
Analog-swap and deletion-sequence screening
Bacterial endotoxin (LAL / rFC) — add-on

Turnaround

Standard: 5–10 business days

Rush: 24–72 hours (quoted per submission)

Quoted per submission — see the GLP-1 guide

Submission

Mail-in submission (nationwide and international)
Tracked chain of custody from receipt to report
One sealed vial per batch is sufficient for the standard panel

GLP-1 verification buyer's guide Tirzepatide reference GLP-1 blind testing protocol

Retatrutide verification panel

Retatrutide (GIP/GLP-1/glucagon triple agonist)

Triple-agonist verification: long-sequence identity by LC-HRMS, purity by RP-HPLC, and content per vial for a molecule with no finished-dose reference on the grey market.

Instrumentation

RP-HPLC purity
LC-HRMS identity
Quantitative content (mg per vial)
Synthesis-impurity screening
Bacterial endotoxin (LAL / rFC) — add-on

Turnaround

Standard: 5–10 business days

Rush: 24–72 hours (quoted per submission)

Per-test pricing published on the cost guide

Submission

Mail-in submission (nationwide and international)
Tracked chain of custody from receipt to report
One sealed vial per batch is sufficient for the standard panel

Retatrutide testing cost breakdown Retatrutide reference GLP-1 blind testing protocol

Service packages

Published packages and turnaround

Basic Verification
7 business days · from $149
HPLC purity + LC-MS identity with a public verification link. Best for most customers.
Full Quant Verification
10 business days · from $249
Adds quantitative concentration (mg per vial) on top of identity and purity. Our flagship package.
Advanced / Custom
21 business days · quoted
Endotoxin, sterility, residual solvents, heavy metals, and custom impurity profiling. Requires method review before scheduling.

Before you choose

How to evaluate any peptide testing lab

Instrumentation matches the molecule: Lipidated GLP-1 analogs need LC-MS or LC-HRMS identity — a generic HPLC-UV purity number alone cannot confirm the side chain. Recombinant HGH additionally needs SEC for aggregation and ELISA for host-cell protein.
Independence from the vendor: A certificate of analysis issued by the seller is a manufacturing document, not third-party verification. Look for labs that test buyer-submitted or blind samples.
Published methods and acceptance criteria: A credible lab states which assays it runs, what each proves, and the pass/fail bounds before you submit — not after you pay.
Written turnaround and chain of custody: Standard turnaround should be stated in business days, with sample receipt and tracking documented from arrival to report.
Blind or split-sample support: Labs confident in their results accept blinded submissions and split-sample comparisons against a reference lab.

Mail-in submission

Submit a sample for testing

Tell us what you are sending and we reply with shipping instructions, a chain-of-custody reference, and a confirmed turnaround — usually within one business day.

Ready to submit? Start a mail-in submission · Testing FAQ hub · Per-test pricing · Lab capabilities