Peptide Research Library — Methods, Hubs & Guides
A structured library of lab-verification methods, category-level peptide-research hubs, and analytical-method references. Educational content only.
Lab Verification & Analytical Methods
How researchers establish that a research-grade peptide is what its label claims — the two analytical questions, the document that answers them, and the categorical distinction behind the "research grade" designation.
Lab Verification Overview
The verification stack end to end: what purity and identity each answer, what a Certificate of Analysis can and cannot establish, and what falls outside the document entirely.
HPLC Purity
What HPLC separates, why a purity figure is an area percentage rather than a mass percentage, and how to read a chromatogram on a COA.
Mass Spectrometry
How mass spec confirms identity, what a mass match proves, and the substitutions it cannot distinguish without fragmentation.
How to Read a COA
A field-by-field walkthrough of a Certificate of Analysis, including net peptide content, excipients, and the dates that matter.
Research Grade vs Pharmaceutical Grade
The categorical distinction between research-use peptides and pharmaceutical-grade material.
Evaluating a Supplier
The seven-point checklist researchers apply to a research-peptide supplier — documentation, purity evidence, labeling, shipping and support.
Category Hubs
Ten hubs, one per research category, each composed from the library itself: a side-by-side comparison of every entry in the category, the mechanism groups inside it, what separates one entry from the next, and the pairings the literature co-studies.
GLP-1 Family
The GLP-1 receptor agonist family as a research category — semaglutide, tirzepatide, retatrutide, liraglutide, dulaglutide, cagrilintide, cagrisema, mazdutide and survodutide compared on class, mass and reported half-life.
9 entries in the library.
Growth & GH-Axis
Sermorelin, CJC-1295, Ipamorelin, the GHRPs, Tesamorelin, MK-677, IGF-1 analogs and PEG-MGF — the growth-hormone-axis research category compared on class, mass and reported half-life.
13 entries in the library.
Tissue Repair
BPC-157, TB-500, KPV, LL-37, Ara-290, glutathione and the repair blends — the tissue-repair research category compared on class, mass and reported half-life.
8 entries in the library.
Nootropic & CNS
Selank, Semax, Dihexa, Cerebrolysin, P21, Oxytocin, DSIP, Pinealon, PE-22-28 and Adamax — the nootropic and central-nervous-system research category compared side by side.
10 entries in the library.
Longevity & Cellular
NAD+, SS-31, Epitalon, Humanin, FOXO4-DRI, Thymalin and Thymosin Alpha-1 — the longevity and cellular-aging research category compared on class, mass and reported half-life.
7 entries in the library.
Cosmetic & Dermal
GHK-Cu, AHK-Cu, Matrixyl, Argireline, SNAP-8 and the melanocortin analogs Melanotan I and II — the dermatological and cosmetic research category compared side by side.
8 entries in the library.
Metabolic & Mitochondrial
AOD-9604, HGH Fragment 176-191, MOTS-c, AICAR, 5-Amino-1MQ, SLU-PP-332 and Adipotide — the fat-metabolism, energy-regulation and mitochondrial research category compared side by side.
8 entries in the library.
Hormonal & Sexual Health
Kisspeptin-10, Gonadorelin, Triptorelin, HCG, HMG and PT-141 — reproductive-endocrinology and neuropeptide research compounds compared on class, mass and reported half-life.
6 entries in the library.
Specialty & Research
PNC-27, VIP, ACE-031 and Follistatin 344 — the niche and emerging research compounds documented in the PeptiDex library, compared side by side.
4 entries in the library.
Research Solutions & Adjuncts
Bacteriostatic water, 1% acetic acid, L-Carnitine, Lipo-C, the MIC blend and Lemon Bottle — the solvents, diluents and adjunct solutions referenced alongside peptide research.
6 entries in the library.
Long-form Research Guides
The editorial companions to the hubs above — full-length guides written for researchers rather than reference tables.
The Complete Guide to Peptide Research
What peptides are, how the library categorises them, and how the pieces of this site fit together.
GLP-1 Peptides Explained
Semaglutide, tirzepatide, retatrutide and liraglutide compared on receptor coverage, structure and discovery timeline.
BPC-157 vs TB-500
The two most commonly co-studied tissue-repair research peptides, compared in depth.
Storage, Reconstitution & Handling
Lyophilised versus reconstituted stability, temperature, freeze-thaw, light and documentation.
Research Tools
Reconstitution Calculator
Concentration, volume per measured amount, syringe units and preparations per vial — with the arithmetic explained.
Compare Peptides
Any two or three library entries side by side on class, molecular weight, half-life, origin and mechanism.
Peptide Directory
The complete index — every entry by category and A–Z with key specifications.
Glossary
The vocabulary the rest of the library is written in.
Comparisons
Sermorelin vs CJC-1295
Two GHRH-analog peptides used in growth-axis research, and why the duration difference changes what is being studied.
Selank vs Semax
Two short synthetic peptides referenced in nootropic-research literature.