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Start here. Covers peptide structure, mechanisms of action, terminology, and the core biology every researcher needs before going deeper.
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Deep dives into BPC-157, semaglutide, TB-500, and the peptides generating the most attention in current research literature.
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Free Research Resource →Research peptides are short chains of amino acids synthesized for laboratory and scientific investigation. They are not drugs or supplements — they are research compounds supplied strictly under a Research Use Only (RUO) framework. See our What Are Research Peptides? guide for a full introduction.
Research peptides exist in a distinct regulatory category from pharmaceuticals. They are legal to purchase for legitimate research purposes in the US under a Research Use Only classification. See our Are Peptides Legal in the United States? article for a detailed breakdown.
BPC-157 is a synthetic peptide studied for its cytoprotective properties. Research has examined its effects on tissue signaling pathways, gastrointestinal function, and cellular repair mechanisms in laboratory settings. See our BPC-157 Research Overview for more detail.
Both are studied in tissue and repair biology research but work through different mechanisms. BPC-157 targets cytoprotective signaling pathways while TB-500 works on actin dynamics and cellular mobility. They are frequently studied together for this reason. See our Peptide Stacks Research Overview, BPC-157 Research Overview, and TB-500 Research Overview for context on how these compounds are studied individually and in combination.
Both semaglutide and tirzepatide are GLP-1 receptor agonists studied for metabolic research, but tirzepatide also targets GIP receptors, making it a dual agonist. Research suggests tirzepatide produces greater average weight reduction in studies.. See our Semaglutide vs Tirzepatide comparison article for more detail.
Peptide Sciences was a major research peptide supplier that shut down operations in 2024, leaving many researchers without a trusted source. BioStrata Research was established to fill that gap with the same commitment to purity and documentation. See our Peptide Sciences Shutdown Analysis for a full breakdown of what happened and what it means for researchers.
Retatrutide is a triple agonist and it activates GLP-1, GIP, and glucagon receptors simultaneously, making it distinct from semaglutide (GLP-1 only) and tirzepatide (GLP-1 + GIP). Phase 3 trial data has shown average weight reductions exceeding 28% at 68 weeks, higher than either compound. It is currently investigational and studied strictly under RUO frameworks. See our Retatrutide Research Overview for a full breakdown, or view the Retatrutide 10mg research compound in our shop.
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