About PeptidePricing.

The research peptide market is unregulated, opaque, and increasingly crowded. At any given time, more than 90 vendors are actively selling research-grade peptides in the United States, with per-milligram prices for the same compound varying by as much as 400% between suppliers. There is no enforced quality floor, no standardized labeling requirement, and no central database of independently verified purity data.

Researchers navigating this market face three distinct problems. First, the pricing problem: without a normalized cost-per-milligram comparison across suppliers, it is nearly impossible to evaluate whether a given price is competitive or inflated. Second, the quality problem: supplier-provided certificates of analysis are self-reported and unverified unless an independent laboratory has confirmed the results against a named batch. Third, the trust problem: vendors enter and exit the market rapidly, regulatory enforcement actions occur without warning, and the proliferation of look-alike domain names means researchers may unknowingly source from a copycat rather than an established vendor.

PeptidePricing was built to address all three. We normalize pricing to cost per milligram so comparisons are apples-to-apples across different vial sizes and bundle structures. We publish third-party verified COA data so researchers can evaluate lab results that were not produced by the vendor being evaluated. And we maintain detailed supplier profiles that surface regulatory history, address discrepancies, payment transparency, and operating tenure — the information that doesn't appear on a product page.

Where we conduct independent testing rather than indexing vendor-published COAs, we use accredited third-party laboratories including Janoshik Analytical and Chromate labs. Neither laboratory has a commercial relationship with any supplier we evaluate.

Results are published in our lab reports database with full chain-of-custody documentation and are not available for vendor review or dispute prior to publication.

Our comparison tool normalizes vendor pricing to cost per milligram across every tracked SKU for a given compound, so researchers can make equivalent comparisons between a 5 mg vial at one price point and a 10 mg vial at another without manual calculation. The tool surfaces the lowest verified cost-per-mg option, flags suppliers with active promotions, and links directly to the relevant supplier profile and COA data for each result.

Pricing data is pulled directly from vendor storefronts on a daily basis. Prices that cannot be independently verified against a live storefront are flagged as unverified and excluded from ranked comparison results until they can be confirmed. Suppliers that have gone offline or received a regulatory action are removed from active comparison results and archived in our supplier history database.

The comparison tool is free to use and requires no account creation.

PeptidePricing operates independently of the suppliers it evaluates. Vendors listed on our platform do not pay for inclusion, cannot purchase a higher lab grade, and are not given advance notice of negative findings before publication. Our editorial and verification decisions are not subject to advertiser review.

Where affiliate relationships exist with specific vendors, those relationships are disclosed. Affiliate status has no influence on lab scores, comparison tool rankings, or editorial coverage. A vendor with an affiliate arrangement that receives a negative lab result or FDA warning letter will have that information published in the same format as any other vendor.

Our supplier grades, lab reports, and editorial reviews represent our independent assessment based on publicly available evidence and independently commissioned testing. They are not endorsements, and they are not legal or safety certifications. Researchers are responsible for their own sourcing decisions.