A free, practical reference for anyone working with research peptides. Read it here, and join the BioRegen research list below for updates on new compounds and research developments. All compounds referenced are for laboratory and educational research only and are not approved for human or veterinary use. Nothing here is medical advice.
Popular research compounds at a glance
| Compound | Class | Receptor / target | Most-studied area |
|---|---|---|---|
| Semaglutide | Peptide | GLP-1 | Glucose & metabolic |
| Tirzepatide | Peptide | GLP-1 + GIP (dual) | Metabolic & weight |
| Retatrutide | Peptide | GLP-1 + GIP + glucagon (triple) | Advanced metabolic |
| BPC-157 | Peptide | Tissue-repair pathways | Recovery & healing |
| TB-500 | Peptide | Thymosin Beta-4 region | Cell migration & regeneration |
| 5-Amino-1MQ | Small molecule | NNMT inhibitor | NAD+ / metabolic |
| Epithalon | Peptide | Telomerase pathway | Longevity |
| GHK-Cu | Copper peptide | Collagen / gene expression | Skin & regeneration |
| SS-31 | Peptide | Mitochondrial cardiolipin | Cellular energy |
| Thymosin Alpha-1 | Peptide | Immune modulation | Immunity |
Receptor agonists 101
- Single agonist (e.g. semaglutide): activates one receptor pathway (GLP-1).
- Dual agonist (e.g. tirzepatide): activates two (GLP-1 + GIP).
- Triple agonist (e.g. retatrutide): activates three (GLP-1 + GIP + glucagon).
In the published literature, engaging additional receptor pathways has generally been associated with broader metabolic effects in study models.
Reconstitution basics
- Bring vials to room temperature; swab stoppers with alcohol.
- Draw the chosen volume of bacteriostatic water into a sterile syringe.
- Add diluent slowly down the vial wall — never directly onto the powder.
- Do not shake. Swirl gently or let it dissolve.
- Label with concentration and date; refrigerate once in solution.
Concentration math: peptide amount ÷ diluent volume = concentration. Example: 10 mg ÷ 2 mL = 5 mg/mL. For more, see our full reconstitution guide.
Storage & stability
- Lyophilized and frozen = most stable.
- Reconstituted = refrigerate; use within a limited, compound-dependent window.
- Avoid repeated freeze-thaw cycles, heat, and light.
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Selected peer-reviewed references
- Jastreboff AM, et al. (2023). Triple-Hormone-Receptor Agonist Retatrutide for Obesity — A Phase 2 Trial. N Engl J Med. doi:10.1056/NEJMoa2301972
- Rosenstock J, et al. (2021). Tirzepatide in type 2 diabetes (SURPASS-1). Lancet. doi:10.1016/S0140-6736(21)01324-6
- Gwyer D, et al. (2019). BPC 157 and musculoskeletal soft tissue healing. Cell Tissue Res. doi:10.1007/s00441-019-03016-8
- Sun WD, et al. (2024). NNMT: a novel therapeutic target for metabolic syndrome. Front Pharmacol. doi:10.3389/fphar.2024.1410479
Reference metadata sourced via PubMed.
Disclaimer: All products and information provided by BioRegen are intended for laboratory and educational research purposes only. Nothing here is medical advice, and no compound referenced is approved for human or veterinary use.