Frequently Asked Questions

To place an order, you must first have an approved research account. Browse our catalog, add items to your cart, and proceed to checkout. During checkout, you'll provide your shipping information and complete the order form.

New to Pepstar Peptides? Apply for a research account to get started.

We take payment via a secure Square invoice after the order is submitted. Square invoices accept the following payment methods:

• Credit Cards (Visa, Mastercard, American Express, Discover)
• Debit Cards
• Apple Pay
• Google Pay
• ACH Bank Transfer
• Cash App Pay
• Afterpay (Buy Now, Pay Later)

You'll receive the invoice via email shortly after placing your order.

There is no minimum order amount. However, orders over $100 qualify for free standard shipping within the United States.

Orders can be modified or cancelled within 2 hours of placement. After this window, orders enter processing and cannot be changed. Please contact support immediately if you need to make changes.

All our peptides are manufactured to a minimum purity of 98%, with most products exceeding 99% purity. Each batch undergoes HPLC testing. Certificate of Analysis (COA) available upon request.

For optimal stability:

• Lyophilized (powder): Store at -20°C for long-term storage, or 2-8°C for short-term (up to 3 months)
• Reconstituted: Store at 2-8°C and use within 2-4 weeks
• Keep away from light and avoid repeated freeze-thaw cycles
• Use bacteriostatic water for reconstitution when possible

Certificates of Analysis (COA) are available upon request. COAs include HPLC purity analysis, mass spectrometry verification, and amino acid sequence confirmation.

Contact us to request a COA for any product.

No. All products sold by Pepstar Peptides are strictly for in-vitro research and laboratory use only. They are not intended for human or veterinary use, and are not to be used for diagnostic or therapeutic purposes.

By purchasing, you confirm that products will be used solely for legitimate scientific research by qualified personnel.

Domestic (USA) shipping typically takes 2-5 business days. International shipping varies by destination, generally 5-14 business days. Express options are available at checkout.

Orders are processed within 24-48 hours on business days.

Yes, we ship to most countries. However, some destinations have restrictions on peptide imports. It is the buyer's responsibility to understand and comply with local import regulations.

International orders may be subject to customs duties and taxes, which are the responsibility of the recipient.

All peptides are shipped in sealed vials with secure packaging to maintain product integrity. Lyophilized peptides are stable at room temperature for short periods during transit.

We stand behind our deliveries. If your package is lost in transit or arrives damaged, contact us within 48 hours of the expected delivery date. We will either reship your order or provide a full refund.

Please retain all packaging materials if reporting damage.

Account verification ensures our products reach qualified researchers conducting legitimate scientific work. This protects both our customers and helps us maintain compliance with research chemical regulations.

Verification is typically completed within 1-2 business days.

We ask for:

• Your name and professional email (institutional emails preferred)
• Organization/institution name
• Your role or position
• Brief description of your research area

In some cases, we may request additional documentation such as institutional ID or a supervisor's contact.

Most applications are reviewed within 1-2 business days. You'll receive an email notification once your account has been approved and activated.

Applications submitted with institutional email addresses are typically processed faster.

Click the "Forgot password?" link on the login page. Enter your email address and we'll send you a password reset link. The link expires after 24 hours for security.

If you don't receive the email, check your spam folder or contact support.