Peptide Research FAQ

In the United States, a research-use-only label does not by itself create a separate legal category. FDA determines a product's status from its intended use — including how it is marketed and the circumstances of its sale — so material labeled for research can still be regulated as an unapproved or prescription drug. Several compounds documented here have approved, prescription-only counterparts. Research-use materials are intended for in-vitro laboratory study; researchers should always consult current regulations in their jurisdiction and their institution.

It signals that a compound is sold for laboratory study — not for human or veterinary use. Research-use peptides are typically not FDA-approved for clinical applications. FDA has stated that research-use or not-for-human-consumption labeling does not change a product's status when other evidence shows it is intended for human use.

HPLC (High-Performance Liquid Chromatography) is the analytical method used to measure peptide purity. Research-grade peptides are generally expected to meet ≥99% HPLC purity, documented on a third-party Certificate of Analysis.

Lyophilized peptides are stable for extended periods at refrigerated or frozen temperatures. Once reconstituted, most peptides have a significantly shorter shelf life and should be protected from heat, light, and freeze-thaw cycles.

Both are chains of amino acids. By convention, peptides contain fewer than ~50 amino acids while proteins are longer. The distinction is functional more than absolute.

Researchers typically compare peptides by their published research profile, structural differences, half-life, receptor selectivity, and documented stability. Cross-referencing peer-reviewed literature is the standard approach.

A COA is a third-party document verifying a specific batch's identity, purity, and composition. Reputable research suppliers publish COAs for every lot, ideally from an independent laboratory.

Sterile water is pure water that has been sterilized. Bacteriostatic water (BAC water) contains 0.9% benzyl alcohol, which inhibits bacterial growth — making it the preferred solvent for multi-use research reconstitution.