Comparisons
- CJC-1295 With and Without DACWhy two products share the CJC-1295 name: what the Drug Affinity Complex is, how it turns minutes of half-life into days, and which form the trials used.
- Cognitive and Longevity Peptide ComparisonSemax, Epithalon, MOTS-c and NAD+ compared: what each is, who developed it, what the cited studies tested, and how far the human evidence goes.
- GLP-1 Family ComparisonSemaglutide, tirzepatide, retatrutide and cagrilintide side by side: receptor targets, developer, regulatory status and the headline trial results.
- Growth Hormone Secretagogue ComparisonCJC-1295 with DAC, ipamorelin and tesamorelin side by side: receptor, developer, half-life, regulatory status and what the published trials measured.
- Melanocortin Peptides: Melanotan II and KPVα-MSH and its analogues: what Melanotan II and KPV are, how the melanocortin receptors work, and which relatives of Melanotan II reached approval.
- Repair and Recovery Peptide ComparisonBPC-157, thymosin β4 (TB-500), GHK-Cu and KPV compared: where each comes from, what the cited studies tested, and how far the human evidence goes.
Certificates and analysis
- How Research Peptides Are MadeSolid-phase peptide synthesis explained: how a sequence is built one residue at a time, where impurities come from, and why TFA is in the vial.
- How to Read a Peptide Certificate of AnalysisWhat each line on a peptide certificate of analysis means: lot number, HPLC purity, mass spec identity, net peptide content, and the red flags to check.
- Reading an HPLC ChromatogramHow to read the HPLC trace behind a peptide purity figure: the axes, the main peak and the small ones, and why area percent is not mass percent.
Handling
- Bacteriostatic Water vs Sterile WaterWhat bacteriostatic water is, what 0.9% benzyl alcohol does to shelf life, when sterile water is the better diluent, and where the 28 days comes from.
- Lyophilised Peptide Storage and StabilityHow to store research peptides: −20°C for lyophilised powder, 2–8°C for solutions, why freeze-thaw and light matter, and which residues degrade first.
- Peptide Reconstitution CalculatorConcentration math for reconstituting lyophilised peptides: mg/mL from vial mass and diluent volume, µg per 0.1 mL and 0.01 mL, with worked examples.
- Why Peptides Are Freeze-DriedWhat lyophilisation is, why research peptides ship as a freeze-dried cake rather than a solution, what a good cake looks like and what the powder contains.
Reference
- Peptide Reference TableCAS number, molecular formula, molecular weight and amino-acid sequence for every compound in the Zyrna Research catalog, in one table.
- Research Peptide GlossaryPlain definitions of the terms on our product pages and guides: acylation, Aib, COA, DAC, deamidation, HPLC, lyophilisation, net peptide content, TFA salt.
Also useful
- Research library — every paper cited on the product pages, one page each, with a plain-language summary and what it does not show.
- Certificates of analysis — every third-party report we hold, with its verification key.
- Frequently asked questions — research use only, shipping, returns, payment and storage in one place.
- Quality and handling — who tests, who does not, and where our figures come from.
Research use only
Reference material for laboratory work. Nothing sold by Zyrna Research is for human or veterinary use.