Research peptide FAQ

Research peptides are short chains of amino acids made synthetically for laboratory study. Researchers use them in in-vitro assays, receptor-binding studies and other preclinical models to study how a sequence interacts with a biological target. Purpose Peptides supplies them as lyophilized (freeze-dried) reagents with batch documentation.

No. Every product is sold for laboratory research use only and is not for human or veterinary consumption. Products are not drugs, foods, cosmetics or dietary supplements, and they have not been evaluated by the FDA to diagnose, treat, cure or prevent any disease.

Our products are intended for researchers, laboratories and research institutions. By ordering, you confirm that you are purchasing for lawful laboratory research, and that you accept our Terms of Service and Research Use Agreement.

No. Purpose Peptides is a research chemical supplier. We are not a pharmacy, compounding pharmacy or outsourcing facility, and we do not provide medical, prescribing or clinical services.

No. We publish compound identity, specifications and batch Certificates of Analysis only. Our product and research pages describe compound identity, chemistry and published literature for reference only.

We publish batch Certificates of Analysis in our COA Library, list our legal business name, phone number ((855) 595-3083), email and business address in San Clemente, California, and publish our full policies. You are welcome to contact us with any question before ordering.

Each batch is tested by high-performance liquid chromatography (HPLC) against a specification of 98% or higher. Actual results vary by batch and are reported on that batch’s Certificate of Analysis, so check the COA for the exact figure.

A COA is the test report for a specific production batch. Ours list the sample, batch number and test date, plus results for total purity by HPLC, impurities, water and TFA content, identity confirmation by mass spectrometry, retention time, endotoxin, bioburden and heavy metals, where those tests were run.

Find the compound in the COA Library or open the COA link on its product page, then compare the batch number and size on the report with the details on your vial and order.

We publish a COA for every compound that has completed testing for its current batch. If a COA is not yet shown for a product, contact us and we will send the current report or tell you when it will be published.

Lyophilized means freeze-dried. Compounds ship as a dry powder, which is more stable in storage and transit than a solution.

Store sealed lyophilized vials frozen or refrigerated, away from light and moisture, and avoid repeated freezing and thawing. Storage temperatures for each compound are listed on its product page.

No. Compounds ship lyophilized, and reconstitution solution is sold separately.

A peptide is a single compound in its own vial. A blend combines two or more compounds co-lyophilized in one vial. A bundle is a set of separate vials grouped by research area and sold together.

A 10-pack is ten sealed vials of one compound and size, from the same tested stock as our single vials, packed and sold as one unit on the Buy Bulk page.

Each 10-pack costs 40% less than ten single vials. When your cart has five or more 10-packs, in any mix of compounds, every 10-pack in the cart is priced at 50% below ten single vials.

No. Wholesale pricing is already applied, so coupon codes, sales and other promotions do not apply to 10-packs. Coupons still apply to single vials in the same order.

Yes. Each 10-pack can be ordered with Purpose-labeled vials or with blank, unlabeled vials.

Yes. You can order up to five 10-packs of each compound and size per order. For larger volumes, use the high-volume and white-label form on the Buy Bulk page.

No. 10-packs are packed to order and ship separately from single-vial items, so they are not eligible for same-day shipping. All 10-pack stock is held in the United States and ships from California.

Add products to your cart, open the cart and select Checkout. By placing an order you confirm our products are for research use only and agree to our Terms of Service and Research Use Agreement.

All prices are in US dollars and payment is taken in full at checkout. Available payment methods are shown at checkout.

Charges appear under our business name, Purpose Peptides. If you do not recognize a charge, contact us at info@purposepeps.com or (855) 595-3083 before disputing it and we will look it up.

We may refuse or cancel any order, including where we suspect fraud, misuse of products or an intended use other than laboratory research.

No. You can check out as a guest. An account lets you see past orders and track shipments.

Single-vial orders placed before 2pm PT on business days usually ship the same day, excluding weekends and holidays. During busy periods processing may take 1–2 business days. 10-packs are not same-day.

All orders ship from California.

Shipping is included on orders of $200 or more within the U.S. Otherwise, shipping is calculated at checkout based on method, package and destination.

We currently ship within the United States only.

You will receive a shipping confirmation email with a tracking number. You can also look up your order on the Track Order page.

Contact us with your order number, clear photos and a short description. Eligible claims may receive a replacement, refund or store credit. See Refunds & Returns.

If a package is confirmed lost in transit, returned due to carrier error or undeliverable, we will reship after verification. See Shipping & Handling.

For safety reasons we cannot accept opened, used or altered products, or items without their original packaging.

Email info@purposepeps.com or use the contact form. We respond to every concern within 7 business days.

Yes. Approved partners earn commission on qualifying orders placed through their link. Details and the application are on the Affiliate Program page.

Yes. Affiliates must clearly disclose their relationship with Purpose Peptides, must not make health, medical or performance claims, and must describe products only as research compounds not for human consumption.