Frequently Asked Questions
Find answers to the most common questions about our research peptides, ordering process, shipping, and product quality.
Ordering & Shipping
How do I place an order?
Browse our catalog, select your desired product and quantity, then click Secure Checkout to complete your purchase via our secure payment processor.
What payment methods do you accept?
We accept major credit cards (Visa, Mastercard, American Express, Discover) through our secure payment processor, as well as Zelle and Venmo for direct payments.
How fast do you ship?
Orders placed before 2:00 PM EST Monday–Friday ship same day. Standard delivery is 2–3 business days via USPS Priority Mail.
Do you offer free shipping?
Every U.S. order ships free, with no minimum spend. Free bacteriostatic (BAC) water is included with every order.
Do you ship internationally?
We ship to all 50 U.S. states with free shipping on every order. Canada is available through card checkout at a flat US$15 shipping rate. Other international destinations are not available.
Can I track my order?
Yes, tracking information is sent via email once your order ships.
Product Quality
What purity are your peptides?
Published certificates report HPLC purity where tested; most published lots test 99%+ by HPLC. Certificates are published on our certificates page; listings without one show a pending marker.
Do you provide Certificates of Analysis?
Yes. Certificates from third-party laboratories are published on our certificates page and on each covered product page; where a listing's certificate is still pending, its page says so.
Are your peptides tested by third parties?
Published certificates come from third-party laboratories and report HPLC purity where tested; most also report endotoxin. Listings without a published certificate show a pending marker.
What does "Research Use Only" mean?
Our products are sold strictly for laboratory and scientific research purposes. They are not intended for human or animal consumption. Purchasers must be at least 21 years of age.
Storage & Handling
How should I store my peptides?
Store lyophilized peptides at −20°C for long-term storage.
What is the shelf life of your peptides?
Lyophilized peptides stored at −20°C typically maintain stability for 24+ months.
Returns & Support
What is your return policy?
We offer a 30-day quality guarantee. If a product arrives damaged, doesn’t meet purity specifications, or is incorrect, we will replace it or issue a full refund. See our Returns & Quality Guarantee page for full details.
How do I contact customer support?
Email us at admin@pureuspeptide.com. We respond within 24 hours on business days.
What if I receive a damaged product?
Contact us within 7 days of delivery with photos. We will replace any products damaged during shipping at no charge, or issue a full refund.
Still have questions?
Our support team is available to help with any additional questions about our research peptides.
Contact Support