# RETA Research — Full Context > RETA Research is a comprehensive peptide research portal covering regenerative, endocrine, therapeutic, and anti-aging peptide science. In-depth mechanism analysis, peer-reviewed citations, and cross-peptide comparisons. ## About This Site RETA Research is part of the System Peptides Research Network — a collection of 21 specialized peptide research resources. Each site focuses on a specific compound or research area, providing peer-reviewed content sourced exclusively from PubMed-indexed publications. This site is an educational resource and does not sell products directly. Research-grade peptides are available at researchvials.com. ## Site Identity - Domain: https://reta-research.com - Network: System Peptides Research Network - Parent Store: https://researchvials.com - Wikidata: https://www.wikidata.org/wiki/Q139376131 - ORCID: https://orcid.org/0009-0004-9811-6147 ## Research Focus Peptides ### Body Protection Compound-157 (BPC-157, Pentadecapeptide, PL 14736, PL-10, Bepecin) - CAS: 137525-51-0 - Molecular Weight: 1419.53 g/mol - Sequence: Gly-Glu-Pro-Pro-Pro-Gly-Lys-Pro-Ala-Asp-Asp-Ala-Gly-Leu-Val - Mechanism: BPC-157 is a synthetic pentadecapeptide derived from a protective protein found in human gastric juice. Its mechanisms of action are multifaceted and have been studied extensively in over 100 animal studies. A central aspect of its activity involves upregulation of growth factor expression, includin... - Research Areas: Tissue Repair, Gastrointestinal Protection, Musculoskeletal Healing, Neuroprotection, Angiogenesis Key Findings: - - - - - ### Thymosin Beta-4 (TB-500 Fragment) (TB-500, TB500, Thymosin Beta 4, Tbeta4) - CAS: 77591-33-4 - Molecular Weight: 4921.0 g/mol (full Tbeta4) - Sequence: Full TB4: Ac-Ser-Asp-Lys-Pro-Asp-Met-Ala-Glu-Ile-Glu-Lys-Phe-Asp-Lys-Ser-Lys-Leu-Lys-Lys-Thr-Glu-Thr-Gln-Glu-Lys-Asn-Pro-Leu-Pro-Ser-Lys-Glu-Thr-Ile-Glu-Gln-Glu-Lys-Gln-Ala-Gly-Glu-Ser - Mechanism: Thymosin beta-4 (Tbeta4) is a 43-amino-acid peptide that is the most abundant member of the beta-thymosin family. Despite its name (a historical artifact from its original isolation from thymus tissue), Tbeta4 is expressed in virtually all nucleated cells and is one of the most abundant intracellula... - Research Areas: Wound Healing, Tissue Repair, Cardiac Repair, Anti-Inflammatory, Hair Growth Key Findings: - - - - - ### Copper Peptide GHK-Cu (GHK-Cu, Glycyl-L-Histidyl-L-Lysine:Copper(II), Copper Tripeptide-1, Linus Pauling Peptide) - CAS: 49557-75-7 - Molecular Weight: 403.93 g/mol (copper complex) - Sequence: Gly-His-Lys (with Cu2+ ion) - Mechanism: GHK-Cu is a naturally occurring copper-binding tripeptide first identified in human plasma by Loren Pickart in 1973. It is found in blood, saliva, and urine, with plasma levels declining from about 200 ng/mL at age 20 to 80 ng/mL by age 60. The copper ion is essential for its biological activity, as... - Research Areas: Skin Remodeling, Wound Healing, Anti-Aging, Hair Growth, Anti-Inflammatory Key Findings: - - - - ### MOTS-c (Mitochondrial Open Reading Frame of the 12S rRNA Type-c) (MOTS-c, Mitochondrial-Derived Peptide) - CAS: 1627580-64-6 - Molecular Weight: 2174.68 g/mol - Sequence: Met-Arg-Trp-Gln-Glu-Met-Gly-Tyr-Ile-Phe-Tyr-Pro-Arg-Lys-Leu-Arg - Mechanism: MOTS-c is a 16-amino-acid peptide encoded by the mitochondrial genome within the 12S rRNA gene. Discovered by Changhan David Lee and Pinchas Cohen at the University of Southern California in 2015, it was one of the first mitochondrial-derived peptides (MDPs) identified with significant metabolic reg... - Research Areas: Metabolic Regulation, Exercise Mimetic, Insulin Sensitivity, Aging Research, Mitochondrial Biology Key Findings: - - - - ### Nicotinamide Adenine Dinucleotide (NAD+, NAD, Coenzyme I) - CAS: 53-84-9 - Molecular Weight: 663.43 g/mol - Sequence: Non-peptide dinucleotide - Mechanism: NAD+ is a fundamental coenzyme in cellular energy metabolism, serving as the primary electron carrier in mitochondrial oxidative phosphorylation and as an essential substrate for sirtuins (SIRT1-7), PARPs, and CD38/CD157 enzymes. NAD+ levels decline significantly with age, impairing sirtuin-mediated... - Research Areas: Aging Research, Cellular Metabolism, DNA Repair, Neuroprotection, Sirtuin Biology Key Findings: - - - - ## Site Pages - Home: https://reta-research.com/ - Research Profiles: https://reta-research.com/research/ - Articles: https://reta-research.com/articles/ - FAQ: https://reta-research.com/faq/ - COA Guide: https://reta-research.com/coa-guide/ - About: https://reta-research.com/about/ - Research Calculator (88+ protocols, dosing phases, mechanisms of action, syringe visualization, FAQs): https://reta-research.com/tools/dosing-calculator/ - Privacy Policy: https://reta-research.com/privacy/ - Accessibility Statement: https://reta-research.com/accessibility/ - Cookie Policy: https://reta-research.com/cookies/ - Disclaimer: https://reta-research.com/disclaimer/ ## Articles ### Essential Peptides for Anti-Aging and Longevity Research URL: https://reta-research.com/articles/essential-peptides-anti-aging-longevity-research/ ### Peptide Research Trends to Watch in 2026 URL: https://reta-research.com/articles/peptide-research-trends-2026/ ### Mitochondrial-Targeted Peptides: The Next Research Frontier URL: https://reta-research.com/articles/mitochondrial-targeted-peptides-research-frontier/ ### Understanding Preclinical vs Clinical Peptide Research URL: https://reta-research.com/articles/preclinical-vs-clinical-peptide-research-explained/ ### Growth Hormone Secretagogues: A Complete Research Guide URL: https://reta-research.com/articles/growth-hormone-secretagogues-complete-research-guide/ ### AI and Peptide Discovery: How Machine Learning Is Changing Research URL: https://reta-research.com/articles/ai-peptide-discovery-machine-learning-research/ ### The SIRT1-NAD+ Axis: A Key Target in Peptide Longevity Research URL: https://reta-research.com/articles/sirt1-nad-axis-peptide-longevity-research/ ### Reading PubMed: A Researcher's Guide to Peptide Literature URL: https://reta-research.com/articles/reading-pubmed-researchers-guide-peptide-literature/ ## Research Applications - Recovery & Healing: Cross-referencing tissue repair research across BPC-157, TB-500, and GHK-Cu to identify synergistic healing pathways and optimal research protocols for regenerative applications. - Cognitive Enhancement: Aggregating neuroprotective peptide data from Selank, Semax, and Pinealon research — comparing anxiolytic, nootropic, and neuroprotective mechanisms across peptide classes. - Anti-Aging & Longevity: Comprehensive longevity research spanning telomerase activation (Epitalon), mitochondrial optimization (MOTS-c, SS-31), and NAD+ pathway modulation for systemic anti-aging science. - Metabolic Research: Comparative analysis of metabolic peptides including AOD-9604, 5-Amino-1MQ, and Tesamorelin — AMPK activation, fat metabolism, and body composition research across multiple pathways. ## Frequently Asked Questions Q: What is RETA Research? A: RETA Research is a comprehensive peptide science portal focused on Regenerative, Endocrine, Therapeutic, and Anti-aging peptide research. We aggregate peer-reviewed data across multiple peptide classes to provide researchers with cross-domain insights and mechanism comparisons. Q: What peptide categories does RETA cover? A: RETA covers tissue-repair peptides (BPC-157, TB-500), neuroprotective peptides (Selank, Semax, Pinealon), metabolic peptides (MOTS-c, AOD-9604, 5-Amino-1MQ), growth hormone secretagogues (CJC-1295, Ipamorelin, Tesamorelin), and longevity peptides (Epitalon, NAD+, GHK-Cu). Q: How is RETA different from single-peptide research sites? A: While single-peptide sites provide deep dives into individual compounds, RETA Research provides cross-peptide analysis, pathway comparisons, and synergy data that help researchers understand how different peptides interact and complement each other. ## Interactive Tools - Research Calculator: https://reta-research.com/tools/dosing-calculator/ 88+ peptide protocols with reconstitution calculator, dosing phases, mechanism of action, half-life data, administration guidance, side effects, compatible stacks, per-protocol FAQs, and interactive syringe visualization. Supports blends with per-component injection breakdowns. ## Research Network (Sister Sites) - PeptideBlends (peptideblends.us): Research Peptide Blends — Wolverine, Glow & KLOW Formulations - BPC-157 Research (bpc157research.us): BPC-157 Peptide Research — Mechanisms, Studies & Citations - TB-500 Research (tb500research.com): TB-500 Thymosin Beta-4 Research — Wound Healing & Tissue Repair - KPV Research (kpvresearch.com): KPV Tripeptide Research — Anti-Inflammatory & Antimicrobial Science - LL-37 Research (ll37research.com): LL-37 Cathelicidin Research — Antimicrobial & Immune Defense - Tesamorelin Research (tesamorelin-research.com): Tesamorelin GHRH Analog Research — Growth Hormone & Metabolism - CJC-1295 Research (cjc1295research.com): CJC-1295 Research — Modified GRF 1-29 With & Without DAC - Ipamorelin Research (ipamorelin-research.com): Ipamorelin Research — Selective Growth Hormone Secretagogue - MOTS-c Research (motscresearch.com): MOTS-c Mitochondrial Peptide Research — AMPK & Metabolic Science - AOD-9604 Research (aod9604research.com): AOD-9604 Research — hGH Fragment for Fat Metabolism Studies - Epitalon Research (epitalon-research.com): Epitalon Telomerase Research — Longevity & Pineal Bioregulation - Selank Research (selank-research.com): Selank Anxiolytic Peptide Research — BDNF & Immune Modulation - Semax Research (semax-research.com): Semax Neuropeptide Research — BDNF, Neuroprotection & Cognition - NAD+ Research (nadplus-research.com): NAD+ Cellular Energy Research — Sirtuins, DNA Repair & Longevity - Pinealon Research (pinealonresearch.com): Pinealon Bioregulator Research — Neuroprotection & Circadian Science ## Quality Standards - All peptides referenced are 98%+ purity, HPLC verified - Independent third-party Certificates of Analysis (COAs) available - 100% USA-based: managed, tested, and shipped domestically - Cold-chain shipping with temperature-controlled logistics - Peer-reviewed content with direct PubMed citations ## Content Policy All content is for educational and research purposes only. Products referenced are for laboratory research use only (Research Use Only — RUO). Not approved by the FDA for human consumption, veterinary use, or any therapeutic purpose. All references to research findings describe preclinical laboratory studies, not clinical recommendations. 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