Frequently Asked Questions

No. All products sold by 21 Peptide are for in-vitro research use only. No prescription is required or accepted, as our products are not approved for human or animal consumption, diagnostic, therapeutic, or clinical use.

Our peptides are research-grade compounds intended exclusively for in-vitro laboratory research. They are manufactured by qualified partners and independently verified by Freedom Diagnostics for purity and identity. They are not FDA-approved medications and are not intended for clinical use.

Research peptides are compounds supplied for in-vitro laboratory investigation. They are NOT medications and cannot be used to treat, diagnose, or prevent any medical condition. Prescription medications are FDA-approved drugs dispensed by licensed pharmacies. 21 Peptide is not a pharmacy.

Every batch is HPLC-verified at 99%+ purity. Exact purity percentages are published on each product page and on every Certificate of Analysis (COA). Testing is performed by Freedom Diagnostics using HPLC with UV Detection plus LCMS/MS for molecular identity confirmation.

Since our products are for research use (not prescriptions), there is no refill system. You can reorder at any time through our online store. Returning customers can use their account to quickly reorder previous purchases.

Standard shipping usually takes 3-5 business days. Expedited shipping options (1-2 days) are available at checkout. Orders are processed within 1-2 business days.

Same-day delivery is not currently available. However, expedited shipping options can get your order to you in 1-2 business days after processing.

Shipping costs depend on order size and destination. Standard domestic shipping rates are calculated at checkout. We periodically offer free shipping promotions on qualifying orders.

After placing your order, you will receive a tracking number by email when your order ships. You can also track your order through your account dashboard on our website.

Due to the nature of research peptides, returns are only accepted in cases of product defect or shipping error. If there is an issue with your order, contact support@21peptide.com within 7 days of receipt and we will resolve it promptly.

You can place a one-time order as a guest, but creating an account allows you to track orders, save preferences, download COAs, and reorder previous purchases easily.

We accept Visa, MasterCard, American Express, Discover, and alternative payment methods including Cash App, Venmo, and Zelle.

Yes. All payment processing is handled through PCI-DSS compliant providers. 21 Peptide never stores your full card details. Our website uses HTTPS encryption for all connections.

Email support@21peptide.com — we respond within 24 hours, 7 days a week. You can also use the Contact page form on our website.

Contact us immediately at support@21peptide.com if you need to change an order. Once an order has shipped we cannot modify it, but we can often help before that point.