PeptidePrices is an independent project. We are not a peptide vendor, not owned by a peptide vendor, and not operated in partnership with any vendor. We accept no sponsorship deals, product placements, or "preferred partner" agreements that would influence how we rank or describe vendors.

Affiliate disclosure: Some outbound vendor links on this site are affiliate links, which means we may earn a small commission on qualifying purchases at no extra cost to you. These commissions help fund ongoing price monitoring, COA verification, and site infrastructure.

Why our affiliate-partner vendors tend to score higher. When we establish a commercial relationship with a vendor, we get visibility that arms-length audits don't reach: their batch-testing cadence on the partner dashboard, customer-service responsiveness when commissions are disputed, the speed at which they respond to COA refresh requests, and direct conversations with their team about quality control. We're not adding a flat "affiliate bonus" — we just have richer data on these vendors than the public has, and that data tends to be reassuring. The same scoring rubric is published publicly and applied to every vendor; partner vendors simply score higher on factors like "COA cadence" and "operations" because we can verify those factors directly rather than inferring from public signals. We disclose this approach so you can weigh it accordingly.

The site is run by a small team with backgrounds in software engineering and longevity research. Our goal is a pricing and quality resource we'd want to rely on ourselves — accurate, independent, and free of vendor influence.

Questions about who we are or how we operate? Email support@peptideprices.net directly. We reply to every message.

Every vendor on this site is scored on a published 1–10 rubric. The rubric is weighted:

• 40% — COA practices: named third-party lab (Janoshik, Colmaric, Vanguard, Freedom Diagnostics, etc.), batch linkage between vial and COA, public availability, testing breadth (purity, identity, endotoxin, sterility, heavy metals), independent verifiability.
• 20% — Community reputation: Trustpilot star rating weighted by review volume, Reddit and forum sentiment on r/Peptides, r/Biohackers, and Longecity, and any documented red flags.
• 20% — Transparency: physical address, company age, ownership disclosure, contact information, return policy clarity.
• 20% — Operations: shipping speed, customer service responsiveness, payment flexibility (credit card support), dispute handling, and functioning partner/affiliate infrastructure.

See the full methodology page for the complete scoring breakdown. Every vendor has an individual detail page with its COA status, curated reviews, and trust signals. We manually verify COA batch IDs against the claimed lab when possible and flag documented mismatches publicly (for example, the Onyx Research COA integrity failure on /is-legit/onyx-research).

Vendor prices are collected by automated scrapers that hit each vendor's public product catalog daily. For Shopify-based vendors (12 of the 19) we use the public /products.json endpoint. For WooCommerce vendors (7 of the 19) we scrape the product category pages directly. No authenticated endpoints, no shady techniques — we read the same listings you would see by visiting the site.

Prices are normalized per standard milligram so you can compare apples to apples. A 5mg vial at $30 and a 10mg vial at $55 are translated into per-mg pricing before ranking. The comparison table always shows both the raw price and the normalized $/mg figure.

Every listing has a "last checked" timestamp. If stock status appears stale, we mark it. Vendors change prices and go out of stock without warning — we recommend verifying with the vendor's site before placing an order. We link directly to the product page to make this easy.

We are upfront about this because opacity is the industry's biggest trust problem, and we don't want to participate in it.

Affiliate links. Some vendor "Buy →" buttons include an affiliate tag. If you purchase through one, we may receive a small commission at no additional cost to you. This is the primary way we plan to fund server costs and the manual vetting work behind the site.

What affiliate relationships do NOT do:

• They do not affect quality ratings. Onyx Research has an affiliate program. We rate them 3/10 because they have documented COA integrity problems.
• They do not affect vendor ordering on the comparison table. The cheapest legitimate vendor wins the top row, every time.
• They do not affect which vendors are listed. We list vendors based on community presence and product availability, not on who pays us.
• Vendors cannot pay to be added, removed, or ranked higher. We have refused this.

Accessory shop. We sell peptide research accessories (bacteriostatic water, syringes, alcohol wipes, mini fridges) at wholesale-plus margins. These products are sourced from medical supply distributors, not peptide vendors — so there is no conflict of interest with pricing rankings.

What we do NOT do:

• We do not take sponsorship payments from peptide vendors.
• We do not run "preferred partner" or "verified vendor" programs.
• We do not sell user data, email lists, or analytics data to any third party.
• We do not publish paid reviews or sponsored comparisons.

We will get things wrong. Prices drift, COAs get updated, vendors change ownership. When we get feedback that something is incorrect, we fix it and update the page — often within 24 hours.

If you spot a wrong price, a broken COA link, a review that should be removed, or a vendor that should be flagged:

• Use the "Report" link on any comparison table row to flag a bad listing (wrong price, out of stock, suspicious). Goes directly to our review queue.
• Email support@peptideprices.net for anything else — vendor concerns, rating disputes, data corrections, press inquiries.
• Submit a vendor review directly on the vendor detail page. All user-submitted reviews go through manual moderation before being published.

PeptidePrices is a research tool. Compounds listed on this site are sold and discussed as research chemicals — they are not for human consumption. Nothing on this site is medical advice, clinical guidance, or a product recommendation.

Consult a licensed physician before using any peptide product. Comply with all applicable laws in your jurisdiction — see our legality map for country-by-country status. Our terms of service and privacy policy apply to all use of this site.