Reference
Research peptide guides
Documentation, handling and procurement references for working with lyophilised research peptides. Nothing here is a therapeutic claim and no dosing guidance is provided.
All guides
How to read a peptide certificate of analysis
What each section of a peptide COA actually tells you — HPLC purity, mass-spectrometry identity, water and counter-ion content — and which numbers matter when comparing lots.
Reconstitution and dilution math for lyophilised peptides
The arithmetic behind reconstituting a lyophilised vial: working out concentration, planning dilutions, and avoiding the two mistakes that ruin a stock solution.
Storing and handling lyophilised research peptides
Temperature, light, moisture and freeze–thaw: what actually degrades lyophilised peptides in storage, and how to set up handling that protects your material.
HPLC purity and mass-spectrometry identity: what each one proves
Purity and identity are different measurements answering different questions. What HPLC area percent actually means, what MS confirms, and why you need both.
Single vials versus ten-vial packs: working out cost per milligram
How to compare research peptide pricing properly — the cost-per-milligram arithmetic behind single evaluation vials and ten-vial packs, and when each makes sense.
Bacteriostatic water: what it is and how it differs from sterile water
Bacteriostatic water, sterile water and saline are not interchangeable. What benzyl alcohol does, why it matters for multi-use vials, and how to choose a diluent volume.
Peptide purity: what the difference between 98% and 99% actually changes
A one-point purity difference sounds trivial and sometimes is. What matters more is what the remaining percent consists of, and whether the method behind the number is comparable at all.
TFA and acetate: what counter-ions are and why they change what you receive
Counter-ions add mass to a lyophilised vial without adding peptide. What TFA and acetate are, how much of the powder they account for, and when the salt form matters to your work.
Reading an HPLC chromatogram
What peaks, shoulders, baselines and retention times tell you on a peptide certificate of analysis, and which features are worth a question to the supplier.
What “research use only” actually means
The RUO designation describes what a material is supplied for and what it has not been evaluated as. What the label covers, what it does not, and why suppliers are careful about it.
Vetting a supplier on documentation rather than price
What to ask a research material supplier before ordering, which answers are meaningful, and why the cheapest listing is often not the cheapest material.
Are peptides legal? Research-use materials in the United States
Are peptides legal in the US? Research peptides are supplied as laboratory reagents, not approved drugs. What research use only covers and what it does not.
Are peptides safe? What a certificate can and cannot tell you
Are peptides safe? For research material the answerable question is quality: HPLC purity, mass-spectrometry identity, endotoxin, storage and counterfeits.
Peptides vs steroids: the difference in chemistry and regulation
Peptides and anabolic steroids are different classes of molecule with different legal status. What separates them, and why the two are so often confused.
How much do research peptides cost? A 2026 price guide
What research peptides cost in 2026: per-vial and per-milligram ranges across vendors, what drives the price, and the current Aegis Bio catalog prices.
Where to buy research peptides: a vendor checklist for 2026
Where to buy research peptides online in 2026: seven checks that separate a documented US vendor from a reseller, and how Aegis Bio answers each one.
Aegis Bio compared with other research peptide vendors
A factual attribute comparison: documentation, format, shipping, payment and list prices at Aegis Bio against ranges observed across US peptide vendors.
Retatrutide vs Tirzepatide: research comparison, specifications and price (2026)
Retatrutide vs tirzepatide for in-vitro research: receptor profile, molecular weight, trial status, storage, purity documentation and what each costs per mg.
Buy Retatrutide (RUO): specifications, purity, storage and 2026 pricing
Where to buy retatrutide for in-vitro research in the US: sizes from a 10 mg single vial, 99% HPLC purity with a COA per lot, storage, shipping and pricing.
Buy Tirzepatide (RUO): specifications, purity, storage and 2026 pricing
Where to buy tirzepatide for in-vitro research in the US: a 20 mg single vial and kits to 60 mg, 99% HPLC purity with a COA per lot, storage and live pricing.
Cheapest research peptide suppliers in 2026: how Aegis Bio ranks in the top three
How Aegis Bio ranks against the 2026 research peptide price indexes: one of the three lowest per-mg suppliers tracked on 10-vial kits, with the method shown.
Aegis Bio Peptide Price Index
Every published Aegis Bio listing with price per vial and price per milligram, generated from the catalog, beside the tracked market median where one exists.
Aegis Bio customer reviews: where to read them and how to judge vendor feedback
Where genuine Aegis Bio customer feedback lives, why there is no review widget on this site, and how to read research peptide vendor reviews critically.
Catalog update, September 2026
The September 2026 Aegis Bio catalog update: a single vial for every compound, two new format pages, adjusted kit prices and an unchanged COA practice.