Practical guidance on peptide purity, certificates of analysis, ordering, storage, shipping, and laboratory research use.
Browse the research catalog, choose the compound and vial size you need, and add it to your cart. At checkout you confirm that the order is for laboratory research use, then complete payment. You'll get an order confirmation email with your order number.
Checkout currently accepts Zelle. Payment instructions appear at checkout and in your order email. We'll update this page as soon as more payment options go live.
Place your order, then send the order total by Zelle using the details shown at checkout. Put your order number in the memo so we can match the payment. Your order moves to processing once the payment is received.
You'll receive a confirmation email with your order number right after checkout, and a second email with tracking once it ships. If nothing arrives within an hour, check your spam folder, then contact us with the name and email you used.
Yes, as long as it hasn't been processed or shipped yet. Contact us as soon as possible with your order number. Once an order ships it can't be cancelled. See the Refunds & Returns Policy for details.
Yes. Laboratories and research institutions ordering larger quantities can request volume pricing. Send us your institution, the compounds and the quantities you need, and we'll reply with a quote.
Checkout runs over an encrypted connection. We collect only what's needed to fulfil your order and verify research use, and we don't sell your data. Read the Privacy Policy for full details.
Orders ship within 1–2 business days once payment is confirmed. You'll receive a tracking number by email as soon as your parcel leaves us.
No. We currently ship within the United States only.
Use the tracking number in your shipping email on the carrier's website. You can also see your order status under My Account.
Carriers sometimes take a day or two to scan a new parcel, so a pause right after shipping is normal. If tracking still hasn't moved after a few business days, contact us with your order number and we'll follow up with the carrier.
Yes. Orders ship in plain, tracked packaging. Vials are sealed in tamper-evident packaging with desiccant to keep moisture out.
Lyophilized (freeze-dried) peptides are stable for the short time they spend in transit, and we add temperature-stable insulation when it's needed. Move them to cold storage when they arrive. Our guide on how temperature affects peptide stability explains why.
Yes. Every batch is tested by an independent laboratory using HPLC-DAD for identity, purity and quantity, plus LAL endotoxin and sterility screening. The results are published in our COA library.
Yes. Every product in the COA library lists its tested lots, each with its own report. Check the results before you order.
Find your product in the COA library and open “View all lots” to see each tested batch. If you're not sure which lot you received, email us your order number and we'll send the matching report.
A COA is the lab report for a specific batch. It shows what was tested, the method used and the results, such as identity, purity and quantity. Read What is a Peptide Certificate of Analysis? for a full walkthrough.
HPLC (high-performance liquid chromatography) separates the compounds in a sample. Purity is the share of the signal that comes from the target peptide rather than related impurities. A higher percentage means fewer impurities. See why third-party purity testing matters.
Purity tells you how much of the peptide material is the target sequence. Peptide content (or quantity) tells you how much peptide is in the vial by mass, since a lyophilized powder also contains counter-ions and residual moisture. A good COA reports both.
Endotoxins are fragments of bacterial cell walls that can interfere with laboratory results. The LAL test measures them, so researchers can confirm a batch is suitable for sensitive assays.
Look for lot-specific COAs from an independent lab, clear research-use-only labeling, published refund and shipping policies, and a real way to reach support. Our guide to evaluating suppliers and COAs and our roundup of FDA warning letters to peptide companies cover the red flags.
Store lyophilized vials at −20°C in a sealed, dry container away from light. Moisture, heat and light are the main causes of breakdown; see what causes peptide degradation during storage.
Stored properly at −20°C, most lyophilized peptides stay stable for 12–24 months. Check the documentation for each compound for exact stability data.
Once reconstituted with bacteriostatic water, keep solutions refrigerated at 2–8°C, avoid repeated freeze-thaw cycles, and use them within the timeframe your research protocol specifies.
Short exposure to room temperature is generally tolerated by lyophilized peptides. Move the vials to cold storage straight away. If you're concerned about a specific shipment, contact us within 7 days of delivery.
That's normal. A lyophilized peptide is a small amount of freeze-dried powder that can look like a thin film or small cake at the bottom of the vial. The quantity is verified on the batch COA.
Yes, cold storage is recommended both before and after reconstitution. Our article Does GHK-Cu Need to Be Refrigerated? covers the details.
Yes. Bacteriostatic water is available in the catalog for reconstituting lyophilized compounds.
Bacteriostatic water contains 0.9% benzyl alcohol, a preservative that inhibits bacterial growth, so a vial can be drawn from more than once. Sterile water has no preservative and is meant for single use.
GLOW (70mg) combines GHK-Cu, BPC-157 and TB-500 in one vial. KLOW (80mg) contains the same three compounds plus KPV. Each blend has its own batch COA.
Wolverine (20mg) combines BPC-157 and TB-500 only, while GLOW adds GHK-Cu. See BPC-157 vs. Wolverine and GHK-Cu vs BPC-157 for how they compare in research.
The catalog includes Retatrutide, Tirzepatide and Semaglutide in several sizes. Our research comparisons cover Retatrutide vs Tirzepatide and Retatrutide vs Semaglutide.
NAD+ is a coenzyme rather than a peptide, but it is widely studied alongside peptides in metabolic and longevity research, often with MOTS-c. Learn more in What is NAD+?.
Research peptides are sold for laboratory use only. Compounded peptides are prepared by a licensed pharmacy for a specific patient under a prescription. Neuro Peptide supplies research peptides only. Read Research Peptides vs. Compounded Peptides.
Because we can't verify how products are stored after delivery, opened or used products can't be returned. We will replace or refund wrong, missing or damaged items, verified quality issues, and orders we can't fulfil. Full details are in the Refunds & Returns Policy.
Contact us within 2 days of delivery with your order number and clear photos of the products, packaging and shipping label. Keep all original packaging until we've reviewed your claim.
Let us know within 2 days of delivery with your order number and photos. Once confirmed, we'll send a replacement or issue a refund.
Report quality concerns within 7 days of receiving your shipment. We'll review the issue against the batch COA and work with you on a fair resolution.
Approved refunds go back to the original payment method whenever possible. Card refunds usually take 7–15 business days to appear, depending on your bank. Store credit may be offered as an alternative.
Our compounds are sold strictly for in-vitro laboratory and scientific research. They are not for human or veterinary use, and they are not intended to diagnose, treat, cure or prevent any disease.
We sell to qualified researchers, laboratories and research institutions. We may ask for documentation of your research affiliation before fulfilling an order. See the Terms and Conditions.
No. They have not been evaluated or approved by the FDA or any other regulatory body for human or animal use.
No. Because our products are for research use only, we don't provide dosing, administration or usage guidance. We're happy to help with COAs, storage and order questions.
Research peptides are sold as research chemicals for laboratory use. Rules vary by jurisdiction, and buyers are responsible for complying with the laws that apply to them. This isn't legal advice.
Our only website is neuropeptide.io. We are not affiliated with other companies that use similar names. If you're unsure whether a site or email is really us, contact us to check.
Email contact@neuropeptide.io or use our contact form. We reply within one business day, often the same day.
Help with COAs, order support, institutional pricing and documentation. We reply within one business day.
Research use only. All compounds sold by Neuro Peptide are for in-vitro laboratory research. They are not for human or veterinary use, are not intended to diagnose, treat, cure or prevent any disease, and have not been approved by the FDA.