The AppealLabs Research Library brings together our educational guides and links to peer-reviewed literature on the peptide compounds we supply for in-vitro and preclinical laboratory research.
Peptide Research Guides
Foundational, handling, verification, preparation, compound-comparison, and analytical-methods guides for laboratory use.
- What Is a Research Peptide? — definition, categories, and how For Research Use Only (RUO) labelling works.
- Lyophilized vs Liquid Peptides — form comparison, stability factors, and when each format is preferred in the lab.
- How to Read a Peptide Certificate of Analysis (COA) — HPLC purity, mass-spectrometric identity, endotoxin, and batch reconciliation, section by section.
- HPLC vs Mass Spectrometry — what each analytical method measures on a research-peptide COA and why both are required.
- How to Reconstitute Research Peptides — step-by-step benchtop protocol, diluent selection, aseptic technique, and post-reconstitution storage.
- BPC-157 vs TB-500 — sequences, molecular weights, mechanism differences, and how to verify each vial.
- Semaglutide vs Tirzepatide — structure, GLP-1 vs dual GIP/GLP-1 receptor pharmacology, and how a research vial differs from the approved medicine.
- What Is GHK-Cu? — copper-tripeptide chemistry, the GHK vs GHK-Cu distinction, and what the preclinical literature reports.
Peptide Research Areas
The compounds AppealLabs supplies sit inside active preclinical research areas. The summaries below describe the scientific literature; AppealLabs products are supplied for laboratory research use only and are not intended for human consumption or therapeutic use.
GLP-1 & Metabolic Peptide Research
Semaglutide, tirzepatide, retatrutide, and cagrilintide — investigated in preclinical models for incretin receptor pharmacology, glucose regulation, and body-composition endpoints. See Semaglutide vs Tirzepatide for a worked structural and receptor-pharmacology comparison.
Tissue-Repair & Cytoprotection Peptide Research
BPC-157 and TB-500 (Ac-LKKTETQ) — investigated in preclinical animal and cell models for angiogenesis, cytoskeletal remodelling, and tissue-repair pathways. See BPC-157 vs TB-500 for a worked comparison.
Copper-Peptide & Extracellular-Matrix Research
GHK-Cu — studied in in-vitro models of collagen and extracellular-matrix protein expression, antioxidant chemistry, and copper-peptide biology. See What Is GHK-Cu? for the chemistry, discovery history, and preclinical literature summary.
Growth-Hormone Secretagogue Research
Sermorelin, CJC-1295, tesamorelin, and IGF-1 LR3 — studied in preclinical models of GH release, GHRH-receptor pharmacology, and downstream IGF-1 signalling.
Mitochondrial & Cellular-Energy Peptide Research
SS-31, MOTS-C, and NAD+ — studied in oxidative-stress, mitochondrial-function, and metabolic-model literature.
Neuropeptide Research
Semax and Selank — studied in preclinical models of neurotransmitter systems, memory, and anxiolytic-related endpoints.
Batch Certificates of Analysis
Every AppealLabs batch is tested by third-party HPLC and mass spectrometry, and the batch-specific Certificate of Analysis is published on the AppealLabs COA Library before purchase — no account required. See How to Read a Peptide COA for how to interpret each section of the report, and HPLC vs Mass Spectrometry for how those two methods together establish purity and identity.
All research materials referenced above describe scientific literature and laboratory-handling considerations only. AppealLabs products are labelled FOR RESEARCH USE ONLY · NOT FOR HUMAN CONSUMPTION.