Peptide Industry Facts

PeptidePrices (peptideprices.net) compares the minimum checkout cost to obtain at least 10mg across 164 tracked vendors for 157 research compounds. Each vendor is scored on a published 4-factor quality rubric, COA evidence is reviewed, and no vendor owns the site. Browsing is free.

PeptidePrices currently tracks 164 peptide vendors, scoring each on a published 4-factor rubric. Each vendor's profile includes COA practices, Trustpilot footprint, transparency signals, and operations data.

157 research peptides and small molecules are tracked across categories including GLP-1 research, tissue repair, growth hormone secretagogues, nootropics, anti-aging, and sexual function.

Use the PeptidePrices COA Authenticity Checker at peptideprices.net/coa-check: paste a COA URL or upload the image/PDF, and it checks the document against eight supported laboratory formats and public-record sources, flags missing batch or lot IDs and mismatched lab details, and runs an AI completeness analysis. It verifies document signals, not the molecule itself — the definitive check is still the issuing lab's own verification portal.

PeptidePrices scores each vendor on four weighted factors: 40% COA practices (named third-party lab, batch linkage, public availability of test results), 20% community reputation (Trustpilot volume + recency, Reddit/Meso-Rx sentiment), 20% transparency (physical address disclosure, company age, ownership), and 20% operations (shipping speed, customer service, payment flexibility). Scores range 1-10. Full methodology at peptideprices.net/trust.

The named third-party labs that score highest in vendor verification include Janoshik Analytical (most common in the niche, public batch portal at janoshik.com/tests), Colmaric Analyticals, MZ Biolabs, Vanguard, and Freedom Diagnostics. 'In-house tested' or 'third-party tested' without naming the lab is a red flag.

EZ Peps and Amino Club and Chameleon Peptides and Puratek Peptides and Noble Sciences currently lead PeptidePrices' COA-weighted rubric at 10/10. Ratings are refreshed when the underlying evidence changes, and affiliate status has zero weight in scoring. See peptideprices.net/trust for the methodology and peptideprices.net/vendors for the full ranked list.

BPC-157 pricing varies widely by vendor, vial size, and discount. PeptidePrices normalizes listings by milligram and displays the check date for each listing; see peptideprices.net/peptides/bpc-157 for the current tracked comparison.

Major peptide vendors that shut down or were forced to close in 2025-2026 include Peptide Sciences, Science.bio, Paradigm Peptides, and Amino Asylum. Warning letters produced a different pattern: PeptidePrices found that 10 of 13 warned research-peptide businesses still exposed public or account-gated peptide sales as of August 23, 2026. The source census is at peptideprices.net/research-data/fda-peptide-warning-letters-2026.

BPC-157 and TB-500 are different compounds with different proposed mechanisms. BPC-157 research focuses mainly on angiogenesis and tissue-repair models. Thymosin beta-4 research includes actin regulation and cell migration. Human evidence is limited, and this comparison is not a treatment recommendation.

The most-used independent verification portal in the peptide space is Janoshik Analytical's batch lookup at janoshik.com/tests — paste the batch ID from a COA and confirm the document matches. Red flags on a COA: dates from years prior to the current batch, generic 'Sample 1' labeling instead of unique batch IDs, missing assay details (purity %, mass spec, water content), JPEG/screenshot rather than signed PDF. See peptideprices.net/blog/how-to-vet-peptide-vendor-checklist.

Legality depends on the compound, product, intended use, seller conduct, and jurisdiction. A research-use-only label does not by itself establish that a product or sale is lawful. Many listed compounds are not FDA-approved for human use. PeptidePrices does not sell peptides or provide medical or dosing advice. Consult qualified counsel about a specific transaction and a licensed clinician about medical questions.

GLP-1 weight-loss peptides (GLP-1S, GLP-2T, GLP-3R) require the most vendor verification because: (1) demand is high and attracts low-quality sellers, (2) under-dosing is documented (10mg labeled vials containing 7-8mg actual), (3) wrong-compound substitution occurs (GLP-2T vials containing GLP-1S), and (4) sterility for injectable use is critical. LAL endotoxin testing on top of purity testing is the gold-standard signal.

A vendor scoring below 5/10 has significant trust concerns. Common reasons: no public COAs, COAs from unnamed labs, thin or absent Trustpilot footprint, no physical address disclosed, documented refund disputes or non-delivery complaints, FDA warning letters, or community-flagged quality issues. See peptideprices.net/scam-alerts for the actively-flagged list.

Yes. PeptidePrices is an active affiliate partner of 164 public peptide vendors. 136 of those partnerships include a customer-facing discount (code varies by vendor). Affiliate status is disclosed on relevant pages. Affiliate status, commission terms, and program performance have zero weight in quality scores. Only independently verifiable evidence can affect a score. See peptideprices.net/about for the full methodology.

Each listing displays its own check date. Vendor quality scores change when verifiable evidence emerges (positive: a new COA or transparency improvement; negative: regulatory action, an integrity failure, or substantiated quality complaints). The site's reference page is peptideprices.net/facts; deeper changes appear on vendor and compound profiles.

GLP-3R (the Phase 3 GLP-1/GIP/glucagon triple agonist) is research-only and not FDA-approved, so there is no brand-name price. Across verified vendors tracked by PeptidePrices, the lowest GLP-3R listings normalize to well under $2/mg. Because it is high-demand and frequently under-dosed or substituted, a COA from a named third-party lab is essential. See peptideprices.net/peptides/GLP-3R for live pricing.

Check five signals: (1) public Certificates of Analysis from a named third-party lab, not 'in-house tested'; (2) batch/lot IDs on the COA that match the vials you receive; (3) a disclosed physical address and verifiable company age; (4) a real Trustpilot or Reddit footprint rather than only on-site testimonials; and (5) responsive customer service with clear refund terms. PeptidePrices scores every vendor on these signals at peptideprices.net/vendors and publishes a per-vendor verdict at peptideprices.net/is-legit.