Independent verification you can trust
Check Your Testing exists because the supplement industry has a transparency problem. We built the infrastructure to fix it — rigorous lab testing, public results, and a verification seal that actually means something.
Why we built this
Billions of dollars are spent on dietary supplements every year, yet independent studies consistently show that a significant percentage of products fail to meet their label claims — or contain contaminants not listed on the label. Consumers deserve better. Brands that do the right thing deserve to stand out. CYT was founded to create a trusted, public record of what's actually in the products people take every day.
How CYT accreditation works
Brand submission
Brands submit their products along with existing third-party lab results, or opt into our coordinated testing program where we arrange testing through an accredited lab.
Lab selection & testing
All testing is conducted by ISO/IEC 17025-accredited laboratories. We maintain a panel of approved labs and rotate assignments to prevent conflicts of interest.
Scientific review
Our in-house scientific team reviews all lab results against label claims, safety thresholds, and current regulatory standards before any verification decision is made.
Public results
Verified products receive the CYT seal and their full lab results are published publicly — every test, every number, every pass or fail.
Annual renewal
Verification is not permanent. Products are re-tested annually and the CYT seal is revoked if a product fails to maintain its standards.
What we test for
Potency & label accuracy
We verify that the active ingredients listed on the label are present at the claimed amounts, within a ±5% tolerance for most nutrients.
Heavy metal contamination
All products are screened for lead, mercury, arsenic, and cadmium against USP and California Prop 65 limits.
Microbial safety
Testing includes total aerobic plate count, yeast and mold, E. coli, Salmonella, and Staphylococcus aureus per USP <2021> and <2022> standards.
Pesticide residues
Botanical and herbal products are screened for pesticide residues using multi-residue panels covering 200+ compounds.
Species identity
Botanical ingredients are verified by DNA barcoding to confirm species identity and detect substitution or adulteration.
Adulterants & undeclared ingredients
Products are screened for undeclared pharmaceutical compounds, stimulants, and other adulterants using HPLC-MS/MS methods.
Our approved laboratory partners
All CYT testing is conducted exclusively through ISO/IEC 17025-accredited laboratories. We work with a rotating panel of independent labs to ensure objectivity.
Eurofins Scientific
ISO/IEC 17025
NSF International
ISO/IEC 17025 + NSF Certified
Intertek
ISO/IEC 17025
Covance Laboratories
ISO/IEC 17025
Informed Sport / LGC
ISO/IEC 17025 + Informed Sport
Built by scientists and consumer advocates
Dr. Sarah Chen
Chief Scientific Officer
PhD in Analytical Chemistry from MIT. 15 years in pharmaceutical quality control and dietary supplement testing.
Marcus Webb
Director of Accreditation
Former FDA compliance officer with 12 years overseeing dietary supplement GMP inspections.
Dr. Priya Nair
Head of Toxicology
Board-certified toxicologist specializing in heavy metal and contaminant risk assessment in food and supplements.
James Okafor
Co-founder & CEO
Consumer advocate and entrepreneur who founded CYT after a personal experience with a mislabeled supplement product.
Ready to get your products verified?
Join the brands that are building consumer trust through transparency.