Test your peptides at PharmLabs
47 tests published across 7 peptides from 23 vendors
first test 3 Sep 2026 · latest 20 Sep 2026
All partner labs →Add Endotoxins and other options with our Standard testing.
About PharmLabs
- Tests published
- 47
- Latest test
- 20 Sep 2026
- Location
- San Diego, CA
- Instrumentation
- HPLC
PharmLabs is an ISO/IEC 17025:2017-accredited analytical laboratory in San Diego, California, operating since 2011 and licensed by the DEA. Finnrick partners with the lab for independent peptide testing — every sample is analyzed on calibrated, professionally operated equipment and returned as a formal Certificate of Analysis (COA) documenting exactly what was found.
See how PharmLabs answered our methodology questionnaire and how it compares to other partner labs.
Methodology Questionnaire
PharmLabs is proud to offer significantly discounted peptide testing exclusively for Finnrick patrons. We share Finnrick’s commitment to advancing health, safety, transparency, and quality within the peptide industry by making independent laboratory testing more accessible. To receive Finnrick’s preferred pricing, samples are submitted through Finnrick, which coordinates and forwards them to PharmLabs for independent testing.
PharmLabs also works directly with manufacturers, distributors, brands, and other organizations seeking an ongoing laboratory relationship. As a DEA-registered, ISO/IEC 17025 accredited laboratory, PharmLabs provides comprehensive peptide testing, including potency/purity, sterility, endotoxins, heavy metals, residual solvents, and microbial testing, along with direct technical support for testing programs and analytical investigations.
A) Quantification Basis
1. Is reported quantity based on absolute calibration against a reference standard, or relative / normalized signal?
Reported peptide quantity is based on external calibration against a qualified reference standard. A calibration curve is generated from known concentrations of the target peptide, and the sample response is evaluated against that calibration. Reported potency is not based solely on relative peak-area normalization.
2. Do you average replicate injections or preparations before reporting a single value?
Samples are analyzed in accordance with the applicable validated method and quality-control requirements. Where replicate preparations or injections are required by the method, results are evaluated according to established acceptance criteria and the reportable result is calculated in accordance with the method.
B) Sample Preparation
3. Do you assume full recovery of peptide upon reconstitution, or do you measure recovery implicitly?
Sample preparation is performed using a defined extraction/reconstitution procedure established for the analytical method. The reported result reflects the peptide recovered and measured under those conditions. Method performance, including recovery where applicable, is evaluated during method validation and/or verification rather than assuming that every individual sample has exactly 100% recovery.
4. Do you correct for adsorption, losses, or degradation, or are these reflected in the final number?
Routine results are not artificially adjusted to compensate for hypothetical adsorption, handling loss, or degradation. The reported result represents the amount measured following the laboratory's defined sample-preparation procedure. Potential sources of loss and method recovery are evaluated as part of method validation and quality control.
C) Detection & Calculation
5. Which detector(s) are used for quantification (UV, MS, both), and which signal is authoritative for quantity?
Quantification is performed using HPLC-DAD. The HPLC-DAD response is the authoritative quantitative signal.
6. How is purity incorporated into quantity (e.g. normalization vs independent measurement)?
Potency and chromatographic purity are separate analytical measurements. Potency is determined quantitatively against a reference standard, while purity is determined according to the applicable chromatographic method. Purity is not used as a substitute for quantitative calibration.
D) Precision & Uncertainty
7. What is your stated margin of error for this peptide, and does it include preparation and calibration uncertainty?
PharmLabs evaluates measurement uncertainty in accordance with its ISO/IEC 17025 quality system and the applicable validated method. The applicable uncertainty is method- and analyte-specific and incorporates identified significant contributors to the measurement process, including sample preparation and calibration where applicable. The laboratory can provide the applicable measurement uncertainty upon request and is provided on the COA.
8. Are reported values rounded, truncated, or raw calculated outputs?
Reported results are raw calculated outputs, according to the laboratory's established reporting and significant-figure requirements. Full-precision calculated values and underlying analytical data are retained within the laboratory records as applicable.
E) Interpretation
9. Does your reported "mg per vial" represent recovered mass, inferred mass, or label-equivalent mass?
Reported mg/vial represents the analytically determined quantity of the target peptide recovered from the submitted vial using the laboratory's defined sample-preparation procedure and quantified against a reference standard. It is not derived from the product's label claim and is not simply an inferred value based on vial fill weight.
10. Under what conditions would you expect two vials from the same batch to differ by less than 1%?
Differences of less than 1% between two vials may be observed when the manufacturing lot is highly homogeneous, vial filling and lyophilization are tightly controlled, the samples have experienced equivalent storage and handling conditions, and analytical variability is sufficiently small relative to the observed difference. PharmLabs does not assume that two vials from the same stated batch will necessarily differ by less than 1%. Inter-vial variation can originate from manufacturing, filling, lyophilization, storage, sample preparation, and analytical measurement.
What you’ll learn
PharmLabs runs your samples through HPLC analysis, and sends back a certificate of analysis, detailing test results. Computed through your choice of Finnrick safety standards, this sample is then declared as “passing” or “failing”, depending on the answers to three critical questions:
Identity
Is this actually what the label claims, or something else entirely?
Purity
Are there other peptides, proteins, or contaminants mixed in with your compound?
Quantity
Did you receive the amount of active ingredient you paid for, or are you dosing based on wishful thinking?
HPLC is the standard analytical method for peptide characterization, used across research institutions and commercial labs worldwide.
Tests PharmLabs can run
Identity, Purity & Quantity
Required BasicConfirms it’s the right compound, at full strength, and only this compound — by HPLC.
Custom orders start at $69 per sample, including Basic and any product surcharge. Prices vary by product and lab.
Endotoxins Testing
From +$119Bacterial toxins can trigger fever or adverse reactions in the body.
Custom orders including this test start at $188 per sample, including Basic and any product surcharge. Prices vary by product and lab.
Heavy Metals Panel
From +$99Traces of arsenic, cadmium, mercury and lead can build up in the body over time.
Custom orders including this test start at $168 per sample, including Basic and any product surcharge. Prices vary by product and lab.
Residual Solvents
From +$139Leftover solvents from synthesis can be toxic if they weren’t fully purged.
Custom orders including this test start at $208 per sample, including Basic and any product surcharge. Prices vary by product and lab.
Sterility Testing
From +$159Checks the vial is free of bacterial and fungal contamination.
Custom orders including this test start at $228 per sample, including Basic and any product surcharge. Prices vary by product and lab.
Peptides PharmLabs can test
How Finnrick publishes results
Finnrick publishes results when we can establish sample provenance and have enough evidence that the sample represents the product sold by the named vendor. Published results include vendor and product details, helping customers evaluate the available evidence and encouraging better supply-chain decisions.
Results that do not meet these requirements are shared with the requester and kept outside the public record. Read how Finnrick decides which results to publish →
Don’t want to share sample details?
The Confidential option costs an additional $99 per sample in Custom, on top of Basic testing, any product surcharge and selected tests. Standard already includes Confidential. Results are shared with you and not published publicly.
Frequently asked questions
Can I test my peptides at PharmLabs?
Choose PharmLabs in Custom when it is available for your product and selected tests. The current options are shown below. The Confidential option is a paid Custom add-on and is included in Standard.
What does PharmLabs test for?
See the current test options on this page. Availability and total price depend on your product, lab and selected tests; Basic testing is required.
Are PharmLabs results independent and trustworthy?
Samples sent through Finnrick are anonymized before they reach the lab. Finnrick reviews lab performance using overlapping results and independently obtained anchor samples. Results are published only when sample provenance meets Finnrick's publication requirements.
How many PharmLabs test results has Finnrick published?
47 published results to date, across 7 peptides and 23 vendors. However, not all tests Finnrick has commissioned from this lab have been published: more about our publishing policy.
Add Endotoxins and other options with our Standard testing.
Do you distribute peptides?
Finnrick offers professional testing services for vendors who want to verify their supply chain and build trust with customers through independent quality assurance.
Learn about vendor services