Frequently Asked Questions

Everything we sell is for in-vitro laboratory research by qualified adults. It is not for human or animal use.

No. Everything we sell is for in-vitro laboratory research only and is not for human, veterinary or food use. We cannot answer questions about personal use.

No. We do not provide dosing, administration or usage guidance for people or animals, and we cannot answer questions about personal use.

You must be 21 or older and confirm at checkout that your purchase is for laboratory research.

We accept payment by Zelle only. After you place your order, send the exact total to the Zelle address shown on your order page and put your order reference in the memo. We do not offer card payments, net terms or invoicing on credit.

Orders ship after we confirm your Zelle payment. We confirm payments Monday to Friday, 9am to 5pm ET. Orders paid and confirmed before 3:00 PM ET on a business day can ship the same day.

No. All orders are prepaid. We do not extend credit, net terms or installment payments.

Yes, before it ships. Email support@stackhausresearch.com with your order number. A cancellation is effective only when we confirm it in writing. Once an order ships, all sales are final; see the Returns page for replacements.

Each lot has a certificate of analysis from independent testing. Find it on the product page or in the certificate library by lot number.

Each certificate lists the product, lot number, test date, laboratory, method and result for that lot. Match the lot number on your vial to its certificate in the COA library. If you cannot find your lot, email us with the lot number and we will check it against our testing records.

Independent third-party laboratory testing by Freedom Diagnostics covers purity, identity and net peptide content, reported per lot. We state only what each certificate measured.

Follow the storage guidance on the product page and certificate. Keep materials sealed, cool, dry and away from light until needed.

See the Shipping page for processing times and carriers. A tracking number is emailed when your order ships.

We ship within the United States with UPS only. We cannot ship to PO boxes or APO, FPO or DPO addresses. Standard is $4.99 (1 to 4 business days, free over $300), Two-Day is $14.99 (free over $174.99), and Overnight is $39.99 for orders placed before 2:00 PM ET. A tracking number is emailed when your order ships. We do not ship internationally.

Materials ship in plain, protective packaging. Orders of 10 or more units of one product require an adult signature on delivery.

Sign in to your account and open Orders.

Signed-in customers with a verified email earn credit on every order, from 2.5 credit per $1 spent on items at Member up to 10 at Private. Credit lands in your balance when the order ships. 100 credit takes $1 off your items at checkout, in whole $1 steps. Credit never pays for shipping or tax and has no cash value.

Your tier follows your item spend over the last 90 days. Member (from $0) earns 2.5 credit per $1. Plus (from $500) earns 3.5 and gets free Standard shipping. Preferred (from $1,500) earns 5, with free Two-Day shipping and early access. Private (from $5,000) earns 10, with free Overnight shipping, early access and direct support.

Spend is what you pay for items, counted after discounts and before tax and shipping. Once you reach a tier you keep it for 90 days, and spending again extends that hold. Refunded and cancelled orders do not count. All orders are prepaid by Zelle; we do not offer net terms.

Yes. Order 10 or more units of the same size of a compound and every unit of that size is 40% off. At 50 or more units of the same size, every unit is 50% off. Orders of 10 or more units of one product ship with adult signature required. All orders are prepaid by Zelle.

Contact us within 3 business days of delivery with your order number and photos. Latent issues have a longer window; see the Returns page for how replacements work.

All sales are final and we do not offer refunds or discretionary returns, other than for order cancellations before shipment, pricing errors, or where the law requires. We may replace a product that arrives damaged, incorrect or out of specification. See the Returns page.

Use the contact page. We reply to research and order questions during business days.