Peptide Price Comparison — Compare Peptide Prices Across Verified Vendors
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Why Trust PeptidePrices?
No vendor owns us
We accept zero affiliate payments that influence rankings. Our full methodology is public.
COAs verified manually
Every vendor's Certificate of Analysis is checked against the claimed third-party lab. We flag mismatches publicly.
Prices refreshed every 24h
Automated scrapers check all 38 vendors daily. Every listing shows when it was last updated.
Save up to 40%
Cross-Vendor Price Optimizer
Build a basket of peptides. We calculate the cheapest combination across all 38 vendors, comparing single-vendor against multi-vendor side by side.
Everything you need for peptide research
Price Comparison
Compare prices across 38 vendors in real time. See cost per mg, in-stock status, and direct product links, all in one table.
AI Stack Builder
Describe your goals and get a science-backed peptide protocol. The assistant explains dosing, scheduling, and potential interactions.
Protocol Tracking
Log doses, track progress, and review your history. Set price alerts so you never miss a deal on compounds you're tracking.
Frequently asked
Do you sell peptides?
No. PeptidePrices is an independent price-comparison and vendor-review platform. We don't sell anything ourselves — we track what other vendors charge and rate them on a published quality rubric. Buying happens on each vendor's own site.
How do you verify COAs?
We manually check each vendor's published Certificates of Analysis against the lab named on the COA (Janoshik, Colmaric, Vanguard, Freedom Diagnostics, MZ Biolabs, etc.). For vendors that offer batch-linked QR codes, we verify a sample batch ID matches the lab's database. Mismatches get flagged publicly on the vendor profile.
What does COA actually mean?
Certificate of Analysis — an independent lab report confirming a peptide's purity (usually via HPLC), identity (mass spec), and safety parameters (endotoxin, sterility, heavy metals). A named, batch-linked, publicly available COA is the strongest trust signal in this market and accounts for 40% of our quality rating.
How often are prices updated?
Every 24 hours. Our scrapers check each vendor's product pages daily. Every listing on the site shows when it was last verified — usually within the last day.
Are peptides legal?
Most research peptides are legal to sell and possess for research purposes in the US. They are not FDA-approved for human use. Vendors label products 'for research only.' See our global legality map at /legal for country-by-country status.
How do your affiliate relationships work?
Some vendor links are affiliate links, which means we may earn a commission on qualifying purchases at no extra cost to you. Vendor rankings are determined solely by our published quality rubric (40% COA / 20% reputation / 20% transparency / 20% operations). Affiliate status has no effect on a vendor's score or position — the full disclosure is in our site footer and at /about.
Can I trust vendors with high quality scores?
A high score means the vendor passes our rubric checks on verifiable evidence (named lab, public COAs, physical address, consistent reviews). It's the best information we can produce, but it's not a guarantee. Always verify batch COAs yourself before a large order, and never skip vendor research — especially for newer or thinly-reviewed vendors.
Tracking prices from 38 vendors
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