Research grade · Documented to the lot
Proof in
every vial
Independent testing and a certificate of analysis matched to your exact lot, on every order. No cut powder. No mystery blends. Receipts over hype.
For research use only · 21+
The research catalog
Every compound, documented
16 research compounds across 6 categories. Every lot is tested and ships with a certificate matched to its number. Pick a category to browse.
Research protocols
Curated research protocols
#1 Research compound
Retatrutide
Our flagship metabolic research peptide, supplied as a lyophilized vial in 10mg or 60mg strengths. Independently HPLC tested with a certificate of analysis tied to your exact lot. Reconstitute for laboratory study. For research use only, not for human or animal consumption.
from $98
Documented, not claimed
A standard you can verify
We publish the proof, not the promise. Every lot is characterized before release and the analytical results travel with the vial you receive.
How we testBeyond purity
What 99% pure does not tell you
Purity testing measures one thing. HPLC and mass spectrometry were built to measure the molecule, not what surrounds it. We test for the four things that number cannot see.
Endotoxins
HPLC and mass spectrometry measure the molecule, not the biological residue around it.
Bacterial endotoxins stay active on their own. They trigger immune responses that corrupt results before an experiment begins. We hold every batch to a conservative limit.
Sterility
A purity test never cultures for living contamination. A vial can pass purity and still grow bacteria or fungi.
Live contamination introduces variables you cannot account for. We verify every batch against sterility standards.
Heavy metals
Lead, arsenic, mercury, and cadmium are inorganic. Chromatography is blind to them entirely.
Trace metals accumulate and skew long studies. We screen every batch with a separate method built to detect them.
Batch consistency
Testing one vial once says nothing about the rest of the production run.
Reproducibility is the foundation of legitimate research. We test to confirm vial nine hundred matches vial one.
Shop by research area
Find your compound
Growth hormone
Secretagogues studied across endocrine and somatotropic pathways.
ExploreMetabolic
Peptides investigated in glucose regulation and metabolic function.
ExploreTissue repair
Sequences researched in cellular regeneration and recovery.
ExploreLongevity
Cofactors explored in cellular aging and senescence.
ExploreNeurological
Peptides studied in cognitive and neural pathways.
Explore
Built on data
Tested and shipped in the USA
Century Labs runs on documented quality control. Tested before release and fulfilled from our own facility. When you order, you get the paperwork to match.
Shop the catalogWhy researchers choose us
The standard in research grade peptides
Independent testing
Each lot is verified by an independent laboratory before it is offered for sale.
Fast dispatch
Orders placed on a business day leave our US facility quickly, tracked and insured.
Damage coverage
Broken in transit or the wrong item shipped. Tell us within 72 hours and we replace it at no cost.
Domestic fulfillment
Packed and shipped inside the United States from our own facility.
Discreet packaging
Plain outer packaging with a generic return address. Nothing on the box identifies the contents.
Real support
Researchers on staff answer sourcing, reconstitution, and certificate questions directly.
Verified across every batch
The testing standard
Seven checks before a batch is offered
Each lot is assayed by an independent laboratory before it is listed, and the signed certificate is matched to the exact vial you receive.
HPLC purity
Reverse phase chromatography quantifies purity, the headline number on every certificate.
Mass spec identity
Mass to charge analysis confirms the compound is exactly what the label claims.
Net peptide content
The actual peptide mass per vial, not gross weight including salts and water.
Endotoxin
Screened to confirm bacterial endotoxin sits below a conservative threshold.
Appearance
Visual confirmation of the lyophilized cake or solution against spec.
Heavy metals
Tested to verify trace metals stay within safe analytical limits.
Lot archival
Every batch carries a unique lot number linked to its certificate and kept on file.
Every order ships with a COA
No lookup, no guessing. A lot matched certificate of analysis is printed and packed with every order, matched to the exact vial you receive.
A lot matched certificate of analysis is printed and packed in the box, documenting the independent purity and identity results for the exact vial you receive.
Analytical purity
Verified by HPLC and confirmed by mass spectrometry. Each lot is characterized before release.
COA with every order
A certificate matched to your lot documents identity, purity, and results, included with the order.
US fulfillment
Tested inside the United States, then packed and shipped from our own facility with tracking.
Answers
Frequently asked questions
Yes. Every lot is tested for identity and purity before it ships, and a certificate matched to your lot travels with the order. Purity is verified by HPLC and confirmed by mass spectrometry.