Answers to the most common questions about lab testing, COAs, accreditation, and regulatory compliance — from supplement brands, researchers, and manufacturers.
Detailed answers sourced from our laboratory team, covering everything from sample submission to understanding your results.
What a COA includes, why retailers require third-party COAs, and what makes one credible vs. potentially fraudulent.
Read guide →A practical walkthrough of every section of a COA — results tables, ND vs. <LOQ, acceptance criteria, and what to flag.
Read guide →The international standard for testing labs — what it certifies, which accreditation bodies matter, and how to verify a lab's scope.
Read guide →Step-by-step: quantities needed, packaging and labeling requirements, shipping conditions, and what paperwork to include.
Read guide →Prop 65 limits for arsenic, cadmium, lead, and mercury; which supplement ingredients carry the highest risk; ICP-MS method explained.
Read guide →USP <467> Class 1/2/3 solvent limits, headspace GC-MS methodology, when testing is required for supplements and hemp extract.
Read guide →Aflatoxins, ochratoxin A, fumonisins, ZEA — which supplement ingredients are highest risk, regulatory limits, and LC-MS/MS testing.
Read guide →FDA 20 ppb action level, EU 4 ppb limit, which foods carry the highest risk, and why cooking doesn't eliminate contamination.
Read guide →What COA documentation Amazon requires, CPC for children's products, what reviewers look for, and how to recover from a listing suspension.
Read guide →HPLC purity, LC-MS identity confirmation, endotoxin limits for injectable peptides, and what a complete peptide COA should include.
Read guide →Purity is a ratio, content is a quantity. A vial can be 99% pure and still hold far less peptide than the label claims. Which number to ask for.
Read guide →Why a purity result says nothing about bacterial endotoxin, when endotoxin testing matters, and whether one vial can be split for both.
Read guide →A batch number on a research peptide vial is a label, not a chain of custody. What it does and does not prove, and how to check a certificate.
Read guide →In an analysis of 6,285 third-party reports, vials that passed purity but missed the label amount outnumbered the reverse by more than ten to one.
Read guide →Who has to accept the report, and which questions do you need answered. A six point checklist that sits upstream of the brand name.
Read guide →Testing consumes what it analyses. How much material a full panel takes, whether the remainder comes back, and how to split one vial.
Read guide →Wavelength, integration rules, column and sample preparation all move a purity percentage. How to read two conflicting reports.
Read guide →What sits in each of the four published packages, and why cheaper quotes elsewhere are often measuring something different.
Read guide →Identity, purity and content: what each number on a peptide certificate means, and what a certificate does not prove.
Read guide →A label is a claim and a certificate is a measurement. Which results actually check a milligram claim.
Read guide →A certificate covers the vial that was tested. When testing more than one vial makes sense.
Read guide →Who ran the assay and who can check it. When a producer's own chromatogram is enough and when it is not.
Read guide →Seven things a supplier's peptide certificate should show, and the gaps that should stop a purchase.
Read guide →What an independent laboratory measures on a GLP-1 class research vial, and why strips and photos do not.
Read guide →Identity, purity and content on the vial submitted. What a certificate should report and what it cannot tell you.
Read guide →Submit your samples to our analytical testing lab in San Diego. Results in 5–10 business days.