For laboratory research use only. Not for human consumption.

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Limited time · 25% off sitewide with code GET25

Research peptides you can actually verify.

99%+ purity, third-party COA published for every lot, same-day US shipping and a 30-day money-back guarantee. Trusted by 15,677+ researchers.

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★ 4.8 average · 15,677+ orders Third-party verified COA Ships today before 2pm ET
As seen onResearch cited from peer-reviewed sources PPubMed THE NEW ENGLANDJOURNAL of MEDICINE JAMA Cochrane nature ForbesHEALTH
Same-day US shippingOrders in before 2pm ET leave the same business day.
Free bac waterIncluded with every order, no code needed.
COA on every lotThird-party HPLC and mass-spec reports published.
30-day guaranteeUnopened vials returnable, full refund on any failed lot.

Step 1 — what are you trying to achieve?

Not sure where to start? Pick the outcome you want — we’ll filter the catalog to exactly the peptides for it.

Step 2 — best sellers

Our 8 top-selling research peptides. Prices already reflect the current sale — code GET25 takes another 25% off at checkout.

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Verified purity, lot by lot

Every batch is synthesised to >99% purity and independently assayed by HPLC and mass spectrometry before release. Certificates of Analysis are published against the lot number printed on your vial, so what you test is exactly what was verified.

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What researchers say

4.8 average across 15,677+ verified orders.

★★★★★
Consistent lot-to-lot purity
Reconstitutes clean every time and the COA numbers match what we measure in-house.
Verified buyer · Lab manager
★★★★★
Shipping is genuinely same-day
Ordered at 11am, tracking hit my inbox before lunch. Packaging was cold-stable and intact.
Verified buyer · Research group
★★★★★
The documentation sold me
Full HPLC and mass-spec reports per batch. That transparency is rare at this price point.
Verified buyer · Independent researcher

Frequently asked

Are these products for human use?

No. Every compound sold by PU Peptides is supplied strictly for in vitro laboratory research. Not for human or veterinary consumption.

How do I use code GET25?

Add products to your cart and enter GET25 at checkout. It applies 25% off sitewide, stacking on top of any product that is already on sale.

Do you publish a Certificate of Analysis?

Yes. Every lot is third-party tested and released with a published COA showing 99%+ purity, identity by mass spec and HPLC.

How fast do orders ship?

Orders placed before 2pm ET ship the same business day from our US facility, with tracking emailed on dispatch.

What is your return policy?

Unopened vials can be returned within 30 days. If a lot ever fails to match its COA we replace or refund it in full.

How should vials be stored?

Lyophilized peptides are stable at room temperature for shipping; store at -20°C long-term and refrigerate after reconstitution with bacteriostatic water.

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New COAs, restocks and research notes. No spam, unsubscribe anytime.

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