Built by Curiosity, Driven by Quality
PepGuide was founded by a team passionate about advancing peptide science. What began as a fascination with biochemistry and molecular signaling became a mission: to provide researchers with the highest-quality peptide materials at accessible prices.
As a family-owned and operated company, we hold ourselves to a higher standard. Every product we carry is selected for its research value, rigorously tested by independent laboratories, and backed by full documentation. We believe researchers deserve materials they can trust, without the markup.
"Our mission is simple: provide research-grade peptides with full transparency, rigorous third-party testing, and pricing that doesn't gatekeep scientific discovery."
Scientific Rigor
Every peptide undergoes multi-panel third-party testing. We publish Certificates of Analysis for every product and every lot. No exceptions.
Family Operated
We're not a faceless distributor. PepGuide is family-owned, and every order is handled with the care and accountability that comes with it.
Accessible Pricing
Quality research materials shouldn't break the budget. We keep our margins fair so more labs and researchers can access what they need.
US Manufactured
Every peptide we carry is synthesized in a cGMP-certified facility based in the United States, ensuring consistent quality and regulatory compliance.
What we screen for, every lot
Every batch is independently tested before it's made available. Here's exactly what we screen for.
Purity (HPLC)
High-performance liquid chromatography confirms peptide identity and purity levels. Each COA reports exact purity percentages so you know precisely what you're working with.
Endotoxins (LAL)
Limulus Amebocyte Lysate testing screens for bacterial endotoxins that could compromise research results. We test every lot to ensure levels fall well within acceptable limits.
Heavy Metals (MS)
Mass spectrometry detects trace heavy metal contamination. This ensures your research materials are free from lead, mercury, arsenic, and cadmium.
What our quality claims reference
Every testing claim on this site maps to a published industry standard. Below are the primary references we rely on.
- USP <1225> — Validation of Compendial Procedures (HPLC purity)
- USP <85> / USP <161> — Bacterial Endotoxins Test (LAL)
- USP <232>/<233> — Elemental Impurities (ICP-MS)
- FDA cGMP — 21 CFR Part 210/211
- ISO/IEC 17025 — Testing & Calibration Laboratories
Research-use only.
PepGuide compounds are sold strictly for laboratory and educational research. They are not approved by the FDA for human or veterinary use, diagnosis, or treatment of any condition. Content across this site is sourced from third-party scientific literature and regulatory standards and is provided for educational reference only.