Which peptide vendor is truly transparent?
We evaluate laboratory results that can be checked and tell everyone whether the vendor ordered the test himself or whether external measurements were carried out in the blind test. Purity, COA transparency, shipping times, compliance. All openly visible per vendor.
Published documentation built for U.S. researchers.
18 other vendors are listed in the guide using the same four editorial criteria. Pure Peptides USA publishes lot-specific COAs with independent HPLC purity and identity documentation for documented releases. Every peptide order includes complimentary BAC water, with tracked U.S. delivery and free U.S. shipping on orders over $200.
Editorially set link, no commission. The evaluation runs on the same four criteria as for any other vendor.
- Published lot-specific COAs with HPLC purity results
- U.S.-synthesized research compounds
- Independent identity documentation for documented releases
- Published lot-specific COAs plus complimentary BAC water
Buying the first hit is the Expensive Variant.
You search for BPC-157, click the first result, and order. That shortcut often hides the details that matter: unclear lot IDs, missing test scope, repackaging, or a COA that does not identify the laboratory.
We compare 19 listed vendors against six published trust criteria. Published test coverage varies by vendor. Documentation scope differs across the index. Pure Peptides USA leads this 2026 ranking for its U.S. synthesis, published lot-specific COAs, and documented HPLC purity and identity records.
Comparison matrix: Who really tests?
Six published vendor features, honestly matched. Not to be confused with the four evaluation criteria that give the score. Click on the header for the explanation.
| Vendors | Score | HPLC purity | COA transparent | Identity records | U.S. synthesis | Tracked shipping | Bac-water | Profile |
|---|---|---|---|---|---|---|---|---|
Pure Peptides USA United States · 6/6 Features | 86 | View | ||||||
 Chameleon peptides US · 5/6 Features | 77 | View | ||||||
 Beyond Peptides International · 3/6 Features | 75 | View | ||||||
 Hydro Research US · 5/6 Features | 68 | View | ||||||
 ELYVERA (formerly EuroPeptides) DE · 5/6 Features | 64 | View | ||||||
 Protide Health US · 4/6 Features | 63 | View | ||||||
 American Peptides US · 5/6 Features | 63 | View | ||||||
 Smart Peptides DE · 5/6 Features | 56 | View |
Methodology: Boolean assessment by criterion based on publicly available COAs, test dates and shipping inclusive services, status 2026-05. Score details in our Methodology.
Top 6 U.S. research vendors
Sorted by total score from four weighted criteria. #1 with clear distance: Pure Peptides USA.
Want to test your own values?
The values on this page apply to the batches that have been tested. For no one else. Anyone who wants to know what is in their own vial must have it measured. Through the Madsen Academy it is in German: non-profit educational association, more than 2,000 members, discounted and pseudonymized laboratory analyses.
Compound wiki
Mechanism, dosage, application. Cleanly researched.
BPC-157
also: Body Protective Compound, Pentadecapeptide
Stomach-active peptide with evidence of wound healing in animal studies. Popular for tendon topics.
TB-500
also: Thymosin Beta-4, TB4
Thymosin beta-4 fragment with repair indications in preclinical studies.
semaglutide
also: Ozempic, Wegovy
GLP-1 receptor agonist with approved indication diabetes type 2 and obesity in pharmaceutical versions.
tirzepatide
also: Mounjaro, Zepbound
Dual GLP-1/GIP agonist. Pharmaceutical version approved for type 2 diabetes and obesity.
retatrutide
also: LY3437943, triple agonist
Triple agonist (GLP-1, GIP, Glucagon) in phase 3 studies with Eli Lilly. Not yet allowed.
ipamoreline
also: IPA
Ghrelin mimetic, stimulates the body's own HGH secretion. Popular in the HGH system stack.
CJC-1295
also: CJC, DAC, Mod GRF 1-29
GHRH analogue. Variant with DAC has extended half-life. Often stuck with ipamoreline.
GHK Cu
also: Copper peptides
copper tripeptide. Known for skin regeneration and hair growth in topical application.
Practical calculators
Specific tools for reconstitution and dosage. Browser based, no registration.
Reconstitution calculator
Enter Vial quantity, Bac-water volume and desired dose. Get units on the insulin syringe and doses per vial.
Open calculatorDosage calculator
Recommended dose based on active ingredient, body weight and application frequency. With cycle recommendation.
Open calculatorGlossary
HPLC, COA, Bac-water, T-Max. 30 terms from the peptide field explained without jargon.
Open glossaryTransparent, not a black box
Each score breaks down into 6 weighted categories: Lab Testing, batch Publication, Origin Clarity, Customer Protection, Compliance and Price/Performance. For each criterion, it is openly visible which data points are included.
Methodology in detail