Built By Curiosity, Driven By Quality
PepGuide was created to bring more clarity, consistency, and trust to the research peptide market. We carefully source research products, provide clear scientific context, and make batch-specific testing documentation available where applicable.
Every product is evaluated for quality, research relevance, and available documentation. Our goal is to give researchers and qualified buyers dependable materials, transparent information, and responsive support from product selection through fulfillment.
Transparent Research, Trusted Materials
"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.
U.S.-Based Production & Fulfillment
PepGuide works with domestic production and fulfillment partners for applicable products, with manufacturing and documentation details varying by product and batch.
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.
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.