High-purity research peptides.

Purity, proven.

High-purity research peptides, lyophilized, third-party tested, and shipped from the United States, with public batch-specific certificates from Horizon Analytical.

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Mix eligible peptides & save up to 30%

Public batch-specific CoAs
UPLC purity + MS identity
Endotoxin results where reported
Free shipment protection

01 — The catalog

Explore high-purity research peptides by strength and price.

Explore the full research range, compare strengths and see current pricing before you choose. Available batch-specific certificates are linked in the public CoA library.

Browse the full catalog →

Mix & save Up to 30% off eligible peptides

Quantity savings apply automatically across mixed eligible vials.

Straightforward shipping Free U.S. shipping over $145

Tracked, discreet delivery with free shipment protection.

Evidence library Public batch-specific CoAs

Inspect reported UPLC purity and mass-spectrometry identity results.

Evidence & terms

Verify the details before you order.

Batch-specific Horizon Analytical CoAsOpen the public certificate library UPLC purity + mass-spectrometry identityWhat each result establishes Endotoxin resultsReported separately; not a sterility claim Lyophilized, third-party tested, and shipped from the United States.Read the precise process statement Same-day dispatch before 2 PM ETIn-stock business-day terms apply Real-human support, Monday–Friday, 5 AM–5 PM ET.Email and WhatsApp Money-Back Purity GuaranteeBelow 99.0% for an eligible individual product; below 98.0% for an eligible blend. Terms apply.

02 — THE STANDARD

We don't ask you to take our word for it. Published certificates identify the referenced lot, the reported test methods, and the reported results. Trust isn't a claim here — it's evidence you can inspect.

THE PROCESS — LYOPHILIZED, THIRD-PARTY TESTED, AND SHIPPED FROM THE UNITED STATES · PUBLIC EVIDENCE WHERE AVAILABLE

STEP 01IdentifiedPublished certificates name the referenced research material, strength and lot.
STEP 02U.S. processLyophilized, third-party tested, and shipped from the United States.
STEP 03ReportedAvailable certificates report the methods and results for the identified lot.
STEP 04VerifiableApplicable certificate authenticity can be checked through Horizon Analytical.
STEP 05ShippedDiscreet, tracked packaging with free shipment protection.

03 — CALIBRATION

Quantified,
not approximate.

Evidence you can inspect. Use the certificate link for an available strength to view the identified lot and reported results from the independent laboratory.

99.0% eligible individual-product guarantee threshold

UPLC + MS purity + identity, where reported

LAL endotoxin, where reported

04 — VERIFICATION

Quality you
can verify.

Available batch-specific certificates are issued by Horizon Analytical, an independent U.S. laboratory. We publish the reported methods and results for researchers to inspect.

UPLCpurity, where reported

MSidentity, where reported

LALendotoxin, where reported

How each reported method supports the evidence

UPLC (Purity)Reports chromatographic purity for the submitted sample under the stated method; it does not establish identity by itself.
Mass Spec (Identity)Reports whether the submitted sample's measured mass is consistent with the expected identity.
Quantitation (Net Peptide Content)Where reported, estimates the amount measured in the submitted sample; it does not establish every vial's exact content.
LAL (Endotoxin)Reports bacterial-endotoxin results for the submitted sample; it is not a sterility test.

CERTIFICATE OF ANALYSIS

COMPOUNDSAMPLE COMPOUND

LOT NUMBERTR-2908661

NET QUANTITY5 MG

IDENTITY (MS)CONFIRMED

PURITY (UPLC)99.33%

ENDOTOXIN (LAL)< 0.05 EU/mL

LABINDEPENDENT · U.S.

▸ View a Certificate of Analysis

05 — Questions

Everything you need to know.

Still unsure? Our team answers research questions every day.

Browse the catalog

How is purity verified for your research peptides?

Eligible individual products pass the Money-Back Purity Guarantee at 99.0% or above; eligible blends pass at 98.0% or above under a pre-approved blend-appropriate method. Published certificates show the tests and results reported for the identified batch. Read the full terms.

What is a Certificate of Analysis, and how do I read it?

A CoA is a laboratory report for the identified sample and lot. Reported fields may include UPLC purity, mass-spectrometry identity, net peptide content and endotoxin. Available certificates are batch-specific; read the document's identifiers and scope rather than treating it as evidence beyond the referenced sample.

How should peptides be stored?

Lyophilized (freeze-dried) peptides are very stable. For short-term storage (under 3 months), a cool, dark place at room temperature is fine. For long-term storage, refrigerate at 2–8°C or freeze at −20°C, and avoid repeated freeze-thaw cycles. Properly stored lyophilized peptides can remain stable for 2+ years.

How fast do you ship, and is cold shipping required?

In-stock orders completed before 2 PM ET Monday–Friday dispatch the same business day, excluding federal holidays and carrier-closure days. DHL Max is standard, and FedEx 2-Day Air is available except for Hawaii. Dispatch is not guaranteed delivery. See shipping and protection terms.

What is your return and refund policy?

Shipment protection covers carrier-confirmed loss or non-delivery, physical transit damage, an incorrect item, or a physical fault present on delivery. You choose one no-cost replacement or an original-payment refund for the affected item. Eligible analytical-purity claims follow the separate Money-Back Purity Guarantee.

How does Tuned Research compare with other research suppliers?

Tuned Research publishes dated, source-linked supplier comparisons covering public batch evidence, exact report scope, matched pricing conditions, shipping, support and remedies. The guides identify documented strengths and limitations for both suppliers, distinguish unknown from absent, and explain how each conclusion was reached. Explore the research supplier comparison library.

Are these peptides for human use?

No. All tuned peptides are sold strictly for research, laboratory and educational purposes only. They are not approved for human consumption, veterinary use, or any therapeutic application. By purchasing, you confirm you are a qualified researcher and will use the products in accordance with all applicable laws and regulations.

06 — The guarantee

Risk stays with us, not you.

We don't compromise on quality — and we put our money behind it.

Research Peptide Purity Guarantee

If eligible independent testing reports below 99.0% purity for an individual product or below 98.0% for a blend, Tuned refunds the affected product to the original payment method. Terms apply.

U.S. process, stated precisely

Lyophilized, third-party tested, and shipped from the United States. What this does and does not claim.

Free shipment protection

Coverage includes carrier-confirmed loss or non-delivery, physical transit damage, an incorrect item, or a physical fault on delivery. Choose one no-cost replacement or an original-payment refund for the affected item. Terms apply.

SSL-encrypted secure checkout

SKU-specific CoA evidence where available

07 — GET STARTED

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