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All compounds are sold for research and laboratory use only. Products are not for human consumption or medical use.

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Free shipping on orders $250+  ·  For research use only
Premium Research Compounds

99%+ purity. Third-party tested. Research use only.

99%+ Purity Verified
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60-Day Money-Back Guarantee
Not satisfied with purity or quality? We'll issue a full refund within 60 days. No questions asked.
Free Shipment Protection
Every order is fully covered against damage, loss, or theft in transit. Ship with complete peace of mind.
COA with Every Batch
Third-party lab results published for every product. Verify purity yourself. We have nothing to hide.
About Us

Premium Research
You Can Trust

PepLab.us is a leading supplier of research-use-only compounds, committed to delivering exceptional quality at competitive prices.

We pride ourselves on fast, reliable shipping, with orders shipped the same day. Trusted by researchers nationwide to provide high-quality research compounds with 99%+ purity.

99%+ Purity
Same Day Shipping
US Lab Based
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Certificate of Analysis
99%
Purity Guaranteed
Why PepLab

Everything You Need to Research With Confidence

Always In Stock
31+ research compounds available 24/7. No backorder delays, no substitutions. Your research timeline never waits.
Same-Day Shipping
Orders placed before 2PM EST ship the same business day, cold-chain packaged with insulated liners and gel ice packs.
99%+ Purity Standard
HPLC-verified, mass spec confirmed. Every batch independently tested. COA published publicly. You see the actual numbers.
US Lab Sourced & Tested
Domestically synthesized and independently tested in certified US laboratories. No overseas sourcing shortcuts.
Expert Support
Our knowledgeable team is available for questions about compounds, reconstitution, storage, and research protocols.
Volume Discounts
Save more the more you research. Bundle deals, multi-vial packs, and bulk pricing available across our catalog.
Testing Standards

Quality You Can Verify, Not Just Trust

Every compound undergoes a 5-stage independent testing protocol. We don't ask you to take our word for it. The data is right here.

99%+
Purity Guaranteed
5
Independent lab tests per batch
100%
Of batches fully verified before sale
31+
Compounds tested to this standard
Verified Potency: Every Single Vial
High-Performance Liquid Chromatography (HPLC) confirms that every compound meets its labeled concentration. We reject any batch that falls below 99% potency before it ever reaches you.
HPLC Verified Labeled Concentration Confirmed 3rd Party Lab
Average Potency Across Catalog99.4%
Batches Passing First Test97.8%
Molecular Identity: Confirmed by Mass Spectrometry
LC-MS (Liquid Chromatography–Mass Spectrometry) verifies the exact molecular structure of every compound. This eliminates counterfeits and confirms you're receiving exactly what the label says.
LC-MS Verified Molecular Identity Confirmed Zero Substitutions
Purity (Chromatographic)>99%
Molecular Match Accuracy100%
Long-Term Stability: Lyophilized for Research
All compounds are supplied in lyophilized (freeze-dried) powder form. This format provides up to 24 months of stability when stored at −20°C, and remains stable for 4–6 weeks at 2–8°C after reconstitution.
Lyophilized Form 24-Month Shelf Life Cold-Chain Shipped
Potency Retained at 12 Months (−20°C)>98%
Endotoxin & Microbial Safety Testing
Every batch undergoes Limulus Amebocyte Lysate (LAL) testing for bacterial endotoxins and microbial contamination screening. This ensures compounds are safe for in-vitro and pre-clinical research environments.
LAL Endotoxin Test Microbial Screen Research Grade
Heavy Metal & Solvent Residue Testing
ICP-MS testing screens for trace heavy metals (lead, arsenic, mercury, cadmium) and residual solvent analysis confirms that synthesis solvents are removed to below detection limits, ensuring research-grade cleanliness.
ICP-MS Heavy Metals Residual Solvent Screen Below Detection Limits
Heavy Metals: Below Limit100%
HPLC lab testing of peptide vial

Here's What You
Should Know

All PepLab.us products are sold exclusively for in-vitro laboratory research and scientific study. They are not approved for human or veterinary use.
Yes. Every batch is tested by independent third-party laboratories using HPLC for purity and Mass Spectrometry for identity. We maintain a minimum 99% purity standard.
Yes. Research peptides are legal to purchase in the United States for laboratory and research purposes. They are not intended for human consumption.
Anyone 18 years or older may purchase from PepLab.us. All customers agree that products will be used exclusively for research purposes.
We ship same-day for orders placed before 2PM EST. Delivery takes 5-7 business days at a $19.99 flat rate. Free shipping on orders over $250.

Third-Party Verified
Every Single Batch

Every compound in our catalog is independently tested by accredited third-party laboratories. Certificates of Analysis available for all products.

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