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Research Peptides
You Can Trust
Research-grade peptides, COA-verified and independently tested on every batch. Defacto Peptides provides research-grade compounds to qualified researchers. Every batch is independently identity-tested with a published Certificate of Analysis.
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4.9/5 from 300+ verified reviews
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99%+ Purity
Verified by HPLC
Defacto Guarantee
Documented quality for research and laboratory use. Every batch meets our internal purity standards.
Shipment Protection
Every order fully covered
CoA with Every Batch
Third party tested in America
Featured Products
Research peptides, third-party identity tested
Everything you need to succeed
From sourcing to shipping, every part of the Defacto experience is built for researchers who demand more.
Join a community of researchers
Access exclusive protocol guides, research updates, and connect with a growing network of researchers advancing peptide science.
Join the CommunityResearch-grade quality
Every compound independently identity-tested. Zero fillers, exact dosing, COAs on every page.
Explore Lab ReportsExpert support
Questions about reconstitution or protocols? Our team responds fast with research-backed answers.
Research library
Peer-reviewed research, reconstitution guides, and dosing references for every compound we carry.
Fast shipping
Ships 1–2 business days. Free standard shipping on orders $100+. Expedited available at checkout.
Free shipment protection — included on every order
Your order is fully insured from our facility to your door. No add-ons, no upgrades. It comes standard.
Quality you can verify, not just trust
Every batch is independently tested by accredited U.S. laboratories. We don't ask you to take our word for it — we give you the proof.
99%+
Purity Guaranteed
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Quality Checks
100%
U.S. Verified
Verified Potency
HPLC AnalysisEvery vial is tested to confirm it contains exactly what the label says — down to the microgram.
Why it matters: No guessing games. You get the exact concentration you paid for, every single time.
99%+ Purity Guaranteed
Mass SpectrometryComprehensive testing confirms our peptides are free from impurities, degradation products, and synthesis byproducts.
Why it matters: Higher purity means better research outcomes. Every batch is verified to 99%+ purity.
Long-Term Stability
pH & Stability TestingOptimal pH and formulation testing ensures every batch remains intact throughout its labeled shelf life.
Why it matters: Stable lyophilized product from the day it ships through the labeled shelf life.
Contaminant-Free
Sterility & LAL TestingRigorous third-party sterility and endotoxin testing confirms products are free from bacteria, fungi, and harmful toxins.
Why it matters: Peace of mind knowing your research won't be compromised by contamination.
Batch-to-Batch Consistency
QC VerificationPrecision weighing and quality controls ensure every batch meets the same exacting standards.
Why it matters: Same great quality whether it's your first order or your fiftieth.
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Free COA included with every order
The Defacto Difference
Why choose Defacto Peptides?
Always In Stock
No backorders, reliable supply
Fair Pricing
Premium quality, honest cost
Safe Shipping
Insured, discreet packaging
Research Community
Protocols, guides & support
Purity Guaranteed
HPLC verified every batch
Shipment Protection
Fully insured, always included
Support
Frequently Asked Questions
Everything you need to know before you order.
We carry BPC-157, GHK-Cu, MOTS-C, CJC-1295/Ipamorelin, TB-500, Retatrutide (RT Peptide), and Bacteriostatic Water. All compounds are independently identity-tested before we accept any batch.
Identity testing confirms the compound is actually what it claims to be using mass spectrometry. Purity testing measures how much of the compound is present. We perform both — and publish a Certificate of Analysis for every batch.
All products are guaranteed 99%+ identity purity. The COA — batch number, test date, methodology, and exact result — is published on every product page so you can verify it yourself.
Lyophilized (powder) peptides should be kept at 2–8°C and remain stable for 24+ months when sealed. Once reconstituted with Bacteriostatic Water, store refrigerated and use within 28 days. Avoid repeated freeze/thaw cycles.
Orders process and ship within 1–2 business days. Domestic delivery is 3–5 business days. Expedited options available at checkout. Free standard shipping on all US orders over $100. Every shipment is insured.
If your order arrives damaged or incorrect, contact us within 7 days and we will make it right immediately. Due to the nature of research compounds, we cannot accept returns on opened vials.
Yes. Our Partner Program is open to researchers, content creators, and healthcare professionals. Apply through the Partner Program page to receive your custom discount code and commission structure.
No. All products are strictly for in vitro and laboratory research use only. Not for human or veterinary consumption. By placing an order you confirm you are a qualified researcher purchasing for research purposes only.
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Identity-tested, COA-verified, and shipped with full protection. Start your research today.
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