Peptide Research Library
61 articles on peptide quality control, laboratory technique and the published research literature from the Australian Peptide Lab research team. Our referenced guides link each scientific claim to its source; see our editorial policy.
Testing & Quality
How purity and identity are measured, what a COA proves, and how to judge a supplier.
How Peptides Are Made: Solid-Phase Synthesis, Cleavage, Purification, Lyophilisation and QC
From Fmoc solid-phase synthesis and TFA cleavage to preparative HPLC, freeze-drying and QC: how research peptides are made and where impurities arise.
8 min read βHow to Choose a Research Peptide Supplier in Australia: An Evidence-Based Framework
A framework for judging research peptide suppliers in Australia: batch documentation, identity testing, business identity, transparency and red flags.
7 min read βPeptide Purity Explained: HPLC Purity, Net Peptide Content and What 98% vs 99% Means
HPLC purity, peptide content and net peptide content are different numbers. What each measures, what the impurities are, and when 98% vs 99% matters.
6 min read βTFA vs Acetate Peptide Salts: Counter-Ions, Assay Interference and the Mass Maths
Why peptides arrive as TFA salts, how trifluoroacetate can interfere with cell and receptor assays, how salt exchange works, and how it shifts mass.
6 min read βUnderstanding Certificates of Analysis for Research Peptides: HPLC, Mass Spec and Red Flags
How to read a peptide certificate of analysis: the HPLC and mass-spec sections, what each proves and misses, and how to spot a fabricated or recycled COA.
7 min read βWhat Is HPLC Testing? How Peptide Purity Is Measured and Where the Method Falls Short
How reversed-phase HPLC measures peptide purity: columns, gradients, UV detection, reading a chromatogram, area-percent maths and the method's blind spots.
6 min read βLab Technique
Reconstitution, storage, solubility, sterile handling and the maths behind them.
Bacteriostatic Water vs Sterile Water: Choosing a Diluent for In-Vitro Peptide Work
Bacteriostatic vs sterile water for peptide stocks: a comparison table, benzyl alcohol levels carried into assays, vehicle controls and when each fits.
6 min read βDesigning In-Vitro ConcentrationβResponse Experiments for Peptides
In-vitro concentrationβresponse design for peptides: ranges, log spacing, controls, replicates, Hill fitting, EC50/IC50 reporting and edge effects.
8 min read βHow Lyophilisation Works: Freezing, Drying and Why a Peptide Cake Stays Stable
Freeze-drying for peptide work: freezing, primary and secondary drying, cake defects, residual moisture, excipients and limits of solid-state stability.
7 min read βHow to Read Peptide Sequences: Codes, Termini, Modifications and Cyclic Peptides
Peptide notation decoded: one- and three-letter codes, NβC direction, Ac- and -NH2, D-amino acids, Aib, Nal, lactams and disulfides, with worked examples.
6 min read βPeptide Blends Explained: Mass vs Molar Ratios, Analysis and Experimental Design
How fixed-ratio co-lyophilised peptide blends work: mass vs molar ratios, analytical challenges, and when separate vials suit experimental design better.
6 min read βPeptide Half-Life in Research: Proteolysis, Clearance and Extension Chemistry
Why native peptides last minutes, how Aib, lipidation, albumin binding, PEG and Fc fusion extend half-life, and how serum and plasma stability assays work.
7 min read βPeptide Molarity Calculations: From Milligrams to Micromolar, Corrected for Net Peptide Content
Peptide molarity maths with worked examples: mass to moles, stock and working solutions, net peptide content, counter-ions, UV checks and serial dilutions.
6 min read βPeptide Reconstitution: A Bench Method for Lyophilised Research Peptides
A bench method for reconstituting lyophilised peptides: equilibration, diluent choice, adding diluent, concentration tables, aliquoting and labelling.
8 min read βPeptide Solubility Troubleshooting: Charge, Co-Solvents and Aggregation
Why peptides fail to dissolve: charge and pI-based solvent choice, acids, bases, DMSO and other co-solvents, sonication, aggregation and decision tables.
6 min read βPeptide Storage and Stability: Powder, Solutions and Australian Summer Transit
How research peptides degrade and how to store them: powder vs solution, freezeβthaw, light, humidity and heat during Australian summer transit.
7 min read βSterile Technique for Peptide Solutions: Aseptic Bench Practice, Filtration and Records
Aseptic technique for peptide solutions: clean benches vs biosafety cabinets, routine, sterile filtration losses, endotoxin, equipment and records.
6 min read βWhat Are Research Peptides? Chemistry, Manufacture, Testing and How They Differ from Medicines
What peptides are, how research peptides differ from medicines and supplements, what research use only means, and how they are made, tested and judged.
7 min read βWhat Is Bacteriostatic Water? Composition, Benzyl Alcohol and Laboratory Use
Bacteriostatic water explained: 0.9% benzyl alcohol chemistry, how the preservative works, its limits, in-use handling and how it interacts with peptides.
6 min read βMetabolic Research
GLP-1, GIP and glucagon receptor peptides and the incretin literature.
Cagrilintide and Amylin-Pathway Research: The Second Satiety Axis
Why amylin analogues are the next frontier of metabolic research and how cagrilintide fits alongside the incretins.
1 min read βCagriSema: Why Researchers Study the Cagrilintide + Semaglutide Combination
The dual-pathway logic behind the most-watched combination in metabolic research.
1 min read βSurvodutide and Mazdutide: The Next Wave of Multi-Agonists
Beyond retatrutide β the glucagon-forward dual agonists reshaping the research pipeline.
1 min read βThe GLP-1 Receptor Explained: How One GPCR Reshaped Metabolic Research
A researcher's tour of the GLP-1 receptor β structure, signalling cascade, and why it became the decade's most important drug target.
1 min read βTirzepatide Research Guide: Dual Agonism at the Bench
Tirzepatide's twin-receptor mechanism, the SURPASS data legacy, and practical laboratory handling.
1 min read βAOD-9604 Research Guide: The hGH Fragment
AOD-9604 β the C-terminal growth-hormone fragment studied in lipid-metabolism models.
1 min read βRetatrutide Research Guide: The Triple Agonist Explained
Everything researchers need to know about retatrutide β mechanism, published data, handling and sourcing in Australia.
1 min read βSemaglutide Research Guide: The Reference GLP-1 Agonist
Semaglutide as a research tool β receptor pharmacology, why it became the benchmark, and lab handling.
1 min read βGLP-1 Research Peptides in Australia: Semaglutide, Tirzepatide & Retatrutide Guide
The incretin research landscape in one guide β what each GLP-1 class compound is, how they differ, and what to look for when sourcing them for laboratory work.
1 min read βRetatrutide vs Tirzepatide vs Semaglutide: The Research Compared
Three incretin-based peptides dominate metabolic research in 2026. Here's how their mechanisms, receptor targets and published data actually differ.
2 min read βGLP-1, GIP and Triple Agonists: The Metabolic Peptide Landscape Explained
Semaglutide, tirzepatide, retatrutide β single, dual and triple receptor agonists compared, and why incretin research is exploding.
1 min read βRepair & Recovery
BPC-157, TB-500 and the tissue-repair research literature.
BPC-157 Research Guide: The Stable Gastric Pentadecapeptide
BPC-157's mechanism, stability, published models and correct handling β the complete researcher's guide.
1 min read βTB-500 (Thymosin Beta-4) Research Guide
How TB-500 works at the cellular level β actin regulation, cell migration models, and lab handling.
1 min read βBPC-157 and TB-500 Together: Why Researchers Study the Combination
BPC-157 and TB-500 are the two most-studied peptides in tissue-repair research β and they work through entirely different mechanisms. Here's what the models show.
1 min read βBPC-157: An Overview of the Research Literature
What the published literature actually says about BPC-157 β from its gastric-juice origins to tendon, ligament and gut-lining research models.
1 min read βGH Secretagogue Research
GHRH analogues, ghrelin-receptor agonists and the GH axis.
GHRP-2 vs GHRP-6: The First-Generation Secretagogues
The original growth-hormone releasing peptides β how they differ, and why ipamorelin superseded them for selective work.
1 min read βSermorelin Research Guide: The Original GHRH Fragment
Sermorelin β GHRH 1-29 unmodified β and its role as the baseline compound of GHRH-analogue research.
1 min read βIGF-1 LR3 Research Guide: The Engineered Growth Factor
How a 13-residue extension turned IGF-1 into a more practical research tool.
1 min read βTesamorelin Research Guide: The Clinically-Proven GHRH Analogue
Tesamorelin's unique position β the only GHRH analogue with completed clinical development β and what that means for researchers.
1 min read βCJC-1295: DAC vs No DAC Explained
The confusing naming of CJC-1295 variants unpacked β what the Drug Affinity Complex changes and which variant suits which research.
1 min read βIpamorelin Research Guide: The Selective Secretagogue
Why ipamorelin's selectivity made it the ghrelin-receptor research standard, plus handling notes.
1 min read βCJC-1295 vs Ipamorelin vs Tesamorelin: Choosing a GH-Axis Research Compound
Three growth-hormone-axis peptides dominate secretagogue research. Here's how a GHRH analogue, a ghrelin mimetic, and a stabilised GHRH differ at the receptor level.
1 min read βCosmetic & Skin Research
Copper peptides, melanocortins and dermal research models.
Snap-8 and the Cosmetic Neuropeptide Family
The 'topical relaxant' peptide class β Snap-8's SNARE-complex mechanism and cosmetic-science research context.
1 min read βPT-141 (Bremelanotide) Research Guide
PT-141's journey from Melanotan II metabolite to approved compound, and its role in MC4R-focused research.
1 min read βMelanotan II Research Guide: The Broad-Spectrum Melanocortin Probe
Melanotan II as a research tool β non-selective melanocortin agonism, light sensitivity, and correct handling.
1 min read βCollagen and Skin-Repair Peptide Research: The Dermal Frontier
How GHK-Cu, KPV-class sequences and matrix biology intersect in cosmetic-science research.
1 min read βGHK-Cu Research Guide: The Blue Copper Peptide
Why GHK-Cu is blue, what dermal and collagen research shows, and how to handle copper peptides correctly.
1 min read βMelanotan II and PT-141: A Guide to Melanocortin Research Peptides
Two closely related peptides, five receptors, and one of the most interesting stories in peptide science β how pigmentation research accidentally opened a second field.
1 min read βLongevity & Cellular Research
Mitochondrial peptides, NAD+ and cellular-ageing models.
MOTS-c Research Guide: The Mitochondrial-Derived Peptide
A peptide encoded inside the mitochondrial genome β MOTS-c and the exercise-mimetic research wave.
1 min read βPinealon and Short Bioregulator Peptides
The Khavinson tripeptides β pinealon and the bioregulator hypothesis in cellular ageing research.
1 min read βSS-31 (Elamipretide): Mitochondria-Targeted Peptide Research
The tetrapeptide that concentrates in mitochondria β cardiolipin binding, bioenergetics, and the ageing connection.
1 min read βNAD+ Research Guide: The Metabolic Coenzyme
NAD+ in cellular-energy and ageing research β what it does, why levels decline, and laboratory handling.
1 min read βEpithalon Research Guide: The Telomerase Tetrapeptide
Epithalon's origins in Russian gerontology, the telomerase hypothesis, and current research context.
1 min read βCognitive & Neuro Research
Semax, Selank and neuropeptide research.
Semax and Selank in Attention and Cognition Research: What the Published Literature Shows
The Russian nootropic peptides have a decades-deep literature spanning attention, cognition and anxiety research models β here's what it actually says.
2 min read βSemax and Selank: The Russian Nootropic Peptides
Two peptides from Soviet-era research institutes that became staples of cognition and anxiety-model research.
1 min read βOther Research Peptides
Immunomodulatory, antimicrobial and other peptide classes in the literature.
Immunomodulatory Peptides in Research: Thymosin Ξ±1, LL-37 and KPV
Thymosin Ξ±1, cathelicidin LL-37 and the Ξ±-MSH tripeptide KPV: mechanisms, what the trials found, and the assay artefacts that confound this literature.
9 min read βNeuropeptides in Research: DSIP, Oxytocin and Kisspeptin
DSIP, oxytocin and kisspeptin: a contested nonapeptide, an approved hormone with a disputed behavioural literature, and the decapeptide that rewrote puberty.
9 min read βWholesale & Business
White-label supply, trade pricing and running a research-supply business.
Choosing a Research Peptide Wholesale Supplier in Australia
What separates a real wholesale peptide supplier from a middleman β verification, stock location, trade terms and the questions to ask.
1 min read βHow to Start a Research Peptide Business in Australia
The honest playbook: sourcing, compliance posture, margins, and the mistakes that kill new research-peptide suppliers in year one.
1 min read βWhite-Label Peptides: How Custom-Labelled Research Supply Works
What white-labelling actually involves β artwork, compliance marking, minimums and margins β for businesses building their own peptide brand.
1 min read βResearch Peptide Pricing in Australia: What Things Should Cost and Why
Why identical-looking vials range from $30 to $300 β the real cost drivers and the prices that should worry you.
1 min read βRegulation
How research peptides are regulated in Australia.