Buy Research Peptides Online
OXpeptides supplies HPLC-verified research peptides at >99% purity to laboratories and independent researchers worldwide. Every vial of research peptide powder is lyophilized, sealed under nitrogen, shipped cold in plain packaging with tracked delivery, and backed by a lot-specific Certificate of Analysis. Retatrutide, BPC-157, TB-500, GHK-Cu, MOTS-c, NAD+, Selank, Semax — our research peptide catalog covers the compounds most frequently requested in 2026 metabolic, regenerative and neurocognitive research. For research use only.
>99% HPLC purity
Every research peptide batch verified by HPLC and confirmed by mass spectrometry. COA on request.
Sealed lyophilized vials
Peptides lyophilized under nitrogen and sealed in USP Type I borosilicate glass vials with crimp caps.
Worldwide tracked shipping
Plain discreet packaging. 3-7 business days to US, UK, EU. Cold-shipment on request for heat-sensitive peptides.
Research-use compliance
Every product labeled "For research use only. Not for human or animal use." — consistent with US and EU research-reagent practice.
Research peptides in stock
Our complete research peptides line-up, each with full research context and HPLC COA on request.
Retatrutide
$94Triple GLP-1 / GIP / glucagon agonist — NEJM Phase II -24.2% bodyweight
>99% · 10 mg
BPC-157
$50100+ peer-reviewed studies on cytoprotection and tissue regeneration
>99% · 10 mg
TB-500
$135Thymosin Beta-4 fragment — actin-sequestering repair modulator
>99% · 10 mg
GHK-Cu
$40Copper tripeptide — dermal remodeling and antioxidant research
>99% · 100 mg
AHK-Cu
$35Copper tripeptide variant — follicular and angiogenic research
>99% · 50 mg
MOTS-c
$130Mitochondrial-derived peptide — AMPK and metabolic homeostasis
>99% · 20 mg
NAD+
$42Coenzyme precursor research — sirtuin activation and DNA repair studies
>99% · 500 mg
Selank
$35Russian-origin heptapeptide — anxiolytic and neurocognitive research
>99% · 5 mg
Semax
$35ACTH(4-10) analogue — BDNF modulation and cognitive research
>99% · 5 mg
Bacteriostatic Water
$80.9% benzyl alcohol — standard reconstitution diluent
>99% · 10 mL
Why researchers buy research peptides from OXpeptides
The research peptides market has expanded rapidly since 2020, driven by the emergence of dual and triple incretin agonists (tirzepatide, retatrutide) that redefined what a single peptide can achieve in metabolic research. OXpeptides was built to serve the independent research community with the same raw-material quality that pharmaceutical contract research organizations expect from specialty suppliers, without the five-figure minimum order quantities and commercial paperwork barriers that close off academic and self-funded laboratories.
When you buy research peptides from us, you receive: a sealed lyophilized vial of research peptide powder, a matched lot number on every box, a Certificate of Analysis available on request documenting HPLC purity >99% and the target mass confirmed by ESI-MS or MALDI-TOF. The research peptide is shipped at ambient temperature in thermally-insulated packaging because lyophilized peptides in sealed glass vials are stable at 2-25°C for several weeks in transit — the cold-chain requirement only applies once the peptide has been reconstituted.
Research peptide categories we stock
Our research peptides fall into four broad pharmacological families: metabolic / weight-loss research peptides (Retatrutide, MOTS-c), regenerative and cytoprotective research peptides (BPC-157, TB-500), copper tripeptides for dermal and follicular research (GHK-Cu, AHK-Cu), and nootropic / neuro-modulatory research peptides (Selank, Semax). We also stock NAD+ for sirtuin-pathway research and bacteriostatic water as the standard reconstitution diluent. Each research peptide page on our site carries the full primary literature citation chain — NEJM, Cell Metabolism, Nature Metabolism — so that researchers can trace the evidence base before buying.
What separates a reliable research peptide supplier from the rest
Three variables matter when you buy research peptides: purity measurement (HPLC-UV at 214 nm is the minimum; best suppliers cross-validate with mass spec), lot traceability (every vial should carry a batch number that maps to a specific COA), and packaging integrity (nitrogen-flushed lyophilization and unbroken crimp seals — any hissing sound on first puncture is the expected vacuum release). OXpeptides hits all three. We also publish plain-English research context on every product page so that a new researcher can understand what a peptide does before committing to an experimental protocol, and we link each research peptide to the sibling compounds that tend to appear together in published protocols.
Compliance and "research use only" framing
Every research peptide we sell is labeled "For research use only. Not for human or animal use." This is not marketing copy — it is the legal and regulatory category under which research peptides are manufactured and shipped in the United States. Research peptides are not FDA-approved drugs. They have not been evaluated for sterility, endotoxin load or stability to the standards required for injectable human pharmaceuticals. If you are designing a human clinical study, source your peptide from a GMP-compliant pharmaceutical manufacturer through the appropriate regulatory pathway — research-grade peptides do not belong in that workflow.
With that said, research peptides are lawfully sold across the US and most of Europe as research chemicals. OXpeptides ships only where possession is lawful for the stated research purpose. The age-gate on our site is not cosmetic: we require acknowledgment that the buyer is an adult researcher aware of the research-use-only limitation. This is the compliance posture that separates a serious research peptide supplier from the fly-by-night operations that trigger the warning articles researchers sometimes encounter when searching online. German-language researchers who prefer a regionally localized catalog may consult peptide-kaufen.eu (DE) for parallel documentation and German-language CoA excerpts.
How to buy research peptides on OXpeptides
The checkout is a two-step flow. Select the research peptide and dosage strength you need from any product page, add to cart, and complete payment with a credit/debit card, Apple Pay, Google Pay or USDC. You will receive an order confirmation email with a tracking number once the research peptide ships, typically within 24-48 hours of order placement. For any batch-specific COA request, a bulk order of research peptides (>10 vials of any single compound), or a custom sequence inquiry, reach us through the contact channel linked in the footer. Our research-use line accepts orders from laboratories, principal investigators and independent researchers worldwide.
Research peptides — frequently asked questions
What are research peptides?+
Research peptides are short chains of amino acids (typically 2-50 residues) synthesized for laboratory investigation. They are supplied as lyophilized powder in sealed glass vials, must be reconstituted with bacteriostatic water before any in-vitro or in-vivo model work, and are sold strictly for research use only — not for human or veterinary administration.
Is it legal to buy research peptides online?+
In the United States and most of the EU, research peptides are sold as research chemicals under the category "not for human or animal use." They are not FDA-approved drugs. Each buyer is responsible for compliance with their local regulations. OXpeptides ships only to jurisdictions where possession of research reagents is lawful for the stated purpose.
What purity level do you guarantee?+
Every peptide on OXpeptides is manufactured to >99% purity as verified by HPLC (High-Performance Liquid Chromatography) and confirmed by mass spectrometry. Lot-specific Certificates of Analysis are available on request via our contact channel.
How fast do you ship internationally?+
Worldwide tracked dispatch within 24-48 hours of order confirmation. Delivery to the United States, Canada, United Kingdom and most EU countries typically completes in 3-7 business days. All shipments use temperature-stable, plain, discreet packaging without any mention of the contents on the outer label.
What is the difference between research-grade and clinical-grade peptides?+
Research-grade peptides (>99% HPLC) are manufactured for in-vitro assays and animal-model experiments. They are not sterile-compounded under GMP conditions required for human pharmaceuticals. Clinical-grade (GMP) peptides undergo additional sterility, endotoxin and stability testing and are reserved for regulated clinical trials. Do not substitute one for the other.
How do I store and reconstitute a lyophilized peptide?+
Store the sealed lyophilized vial at -20°C protected from light. To reconstitute, slowly inject bacteriostatic water (0.9% benzyl alcohol) down the inner wall of the vial using a sterile insulin syringe, then swirl gently until fully dissolved — never shake. Store the reconstituted solution at 2-8°C and use within 28 days.
Do you provide a Certificate of Analysis (COA)?+
Yes. Lot-specific HPLC and mass spectrometry COAs are issued for every batch and available on request. Simply reference your order number and we will forward the corresponding documentation.
What payment methods can I use?+
We accept major credit and debit cards (Visa, Mastercard, Amex), Apple Pay, Google Pay, and USDC / stablecoin payments. All card transactions are processed through a PCI-DSS compliant gateway. No account or crypto wallet is required for card checkout.
New to research peptides? Start with the complete 2026 guide.
Mechanisms, dosing research protocols, reconstitution, storage, and sourcing checklist — 2,200 words.