74 vendors scoredUpdated weekly

The most current peptide prices.

Live pricing, COA-verified lab results, and shipping data across 74 vendors. Refreshed continuously. No vendor pays for ranking.

Refreshed daily
74 vendors scored
Independently tested
$2,688/yr
Average overpay
buying Tirzepatide from the wrong vendor
42 vendors
Carry Tirzepatide
each scored on price, purity & shipping
4 days ago
Last refresh
prices verified weekly across the directory
Methodology

How we score 72 vendors.

Six dimensions, weighted by what actually matters when you're sourcing peptides for research. No vendor pays for placement. No affiliate kickbacks change a score.

30%
COA
Independent purity verification
Evidence: Third-party HPLC + mass spec results per batch
25%
Price
Cost per milligram, all-in
Evidence: Spot-checked weekly across the full catalog
15%
Reputation
Track record in the research community
Evidence: Reddit, Discord, COA cross-references over 12+ months
10%
US shipping
Delivery to the US
Evidence: Tested ship times, customs reliability, refund policy
10%
Catalog depth
Breadth of compounds carried
Evidence: Number of unique peptides with verified inventory
10%
Payment
Payment safety & flexibility
Evidence: Card, crypto, ACH options + dispute protections

Weights sum to 100%. COA verification carries the most weight because pricing means nothing if the compound isn't what the label says.

Read the full methodology
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