Supplier checklist

How do I choose a peptide supplier?

The best peptide supplier for research is one that publishes a per-batch, third-party Certificate of Analysis (identity by mass spectrometry, purity by HPLC), is a verifiable business entity, prices and sources transparently, labels material research use only, and supports more than one payment method.

Supplier checklist at a glance

Per-batch third-party CoA

Independent lab verification for the specific batch, not a generic specimen result.

Verifiable business entity

A real, checkable registered business — not an anonymous storefront.

Transparent purity & pricing

Purity spec and per-mg pricing stated clearly, not buried or vague.

Research-use-only labelling

Clear RUO framing on every product and order.

Consistent batch reporting

CoAs published consistently across batches, not only for a hand-picked sample.

Responsive support

A real support channel that answers order and testing questions.

Multiple payment rails

More than one payment method supported.

Independent reputation

A track record verifiable outside the supplier’s own site.

Why the CoA is the starting point

A Certificate of Analysis is the direct evidence that a batch is what it claims to be — identity confirmed by mass spectrometry, purity confirmed by HPLC, from a lab independent of the seller. Everything else on this checklist (business verifiability, transparent pricing, labelling) is easy to state; a per-batch CoA is the one item a supplier cannot fake without a lab’s cooperation.

Frequently asked questions

What does "per-batch CoA" mean and why does it matter?

A Certificate of Analysis (CoA) is a third-party laboratory document attesting identity, purity (typically HPLC), and related quality metrics for a specific manufacturing batch. A per-batch CoA matters because a single "representative" specimen result does not guarantee every batch matches it — you want the certificate for the exact batch you are ordering.

Is New-U a verifiable business entity?

New-U is operated by Hilxera Distribution Services LLC, a Wyoming-registered distributor — the filing is publicly checkable via the Wyoming Secretary of State (https://wyobiz.wyo.gov/business/FilingDetails.aspx?eFNum=141064042191138051150141229016107134074255163094).

Related research

How to read a peptide CoA this hub

Full supplier-evaluation guide

New-U official domains list

All compounds referenced are supplied for laboratory research use only and are not for human or veterinary use. Nothing on this page is medical advice. Every order, account and payment completes on the canonical store at new-u.io.

Research use only — not for human consumption. All products are supplied strictly for laboratory research purposes.