5-Amino-1MQ
From $39.99
$103.00
Featured Collections
We add new research compounds every week.
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New ArrivalsCheck out our latest research compounds.Shop Now Sale 
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GHK-Cu
From $30.00 $64.00Sale 
Glow BPC-157 + GHK-CU + TB-500
From $99.99 $181.00Sale 
Retatrutide
From $56.99 $90.00Sale 
Acetic Acid Water 0.6%
From $14.99 $19.00Sale 
AOD9604
From $56.00 $64.00
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Third-Party Tested
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99%+ Purity Verified
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Fast Tracked Shipping
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Lab Grade Quality
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Designed for Serious Researchers
Thornhill Peptides delivers research-grade compounds with 99%+ purity, backed by third-party certificates of analysis. It's the right choice if you:
- Need reliable, research-grade compounds
- Require third-party verified certificates of analysis
- Want 99%+ purity guaranteed on every product
- Need fast, discreet shipping to your lab or facility
- Value transparent sourcing and consistent quality
Tested. Traceable. Trusted.
Quality you can verify.
Third-party tested
Independent third-party analysis confirms identity and purity on every lot.
≥99% purity
Measured, documented, and published — not just claimed.
Lot traceable
The COA number matches the exact vial in your hands.
Fast, discreet shipping
Tracked and protected in transit, dispatched quickly on every order.
Peptide Research Blog Research Stories
Every article is crafted to bring you closer to the science behind peptide research.
Stay Informed. Stay Ahead. Stay Curious.
GH
GHK-Cu vs. Argireline for Hair Density After 45: Which Topical Peptide Actually Regrows Thinning Crown in 2026?
GHK-Cu has real clinical evidence for increasing hair density after 45, while Argireline has no hair-growth mechanism. Here's what actually...
GH
GHK-Cu vs. Argireline for Under-Eye Hollows and Fine Lines: Which Peptide Actually Delivers in 2026?
GHK-Cu rebuilds collagen to plump under-eye hollows, while Argireline relaxes muscles to smooth fine lines. Discover which peptide actually delivers...
FAQ
Common Questions? Clear Answers.
Everything you need to know about our research peptides — purity, third-party testing, storage, and shipping. Can't find your answer? Reach out and our team will help.
Are your peptides third-party tested?
Yes. Every batch is independently verified by HPLC and mass spectrometry, and we publish a Certificate of Analysis (COA) for each lot so you can confirm purity and identity before you order.
What purity should I expect?
Our research compounds are 99%+ pure by HPLC. The exact figure for the lot you receive is listed on its COA.
How should the peptides be stored?
Lyophilized (freeze-dried) peptides ship at ambient temperature and are best kept in a freezer. Once reconstituted, store them refrigerated and use within the window noted for that compound.
Are these products for human use?
No. Everything we sell is strictly for laboratory and research use only (RUO) — not for human or veterinary consumption, or any therapeutic application.
Do you provide a COA for every lot?
Yes. A lot-specific COA covering purity, identity, and batch details is available for every product — see the COA page.
How fast is shipping?
Orders are processed quickly and sent with tracked, discreet packaging designed to protect the integrity of the compounds in transit.