We offer Flat Rate Ground (3–5 business days, $14.99), Priority 1–3 Day Shipping ($19.99), FREE standard shipping on orders of $100 or more, and FREE Priority shipping on orders of $250 or more within the United States. All products are shipped as lyophilized (dry) reference standards in sealed vials. For shipping-related questions, see our Shipping Policy or contact us directly.

Shipping Protection is included free on every order of $150+ and for our Senior Researcher loyalty tier and up (optional 3% add-on under $150). It covers a free reship or refund for orders lost in transit, and a free replacement for orders arriving damaged. To file a claim, log in and visit the Claims tab in My Account, or click “File a shipping claim” on the order. Claims must be filed within 30 days. See our Shipping Protection coverage page for full details.

We currently ship within the United States only. International shipping may become available in the future.

A Certificate of Analysis (COA) is a document provided by an independent, USA-based, ISO/IEC 17025-accredited third-party laboratory that verifies the identity, purity, and composition of a research peptide. Every Precisely Peptides product includes a downloadable COA accessible from the product page.

For proper storage and handling procedures, please refer to the Certificate of Analysis provided with each product. All products should be kept away from direct sunlight and moisture.

Yes. The Precisely Promise backs every order: a 30-day satisfaction guarantee on unopened products (full refund, no restocking fee), a 99%+ Purity Guarantee backed by an independent COA (full refund plus free replacement, and we reimburse your test cost, if a product ever tests below its stated purity), and free Shipping Protection on orders of $150+ and for our Senior Researcher loyalty tier and up. See our Refund & Return Policy.

Every order is backed by our 30-day satisfaction guarantee: return any unopened, factory-sealed product within 30 days of delivery for a full refund (no restocking fee). Opened or unsealed vials cannot be returned for change-of-mind reasons, but quality concerns are covered by our 99%+ Purity Guarantee, and wrong or missing items are replaced free within 7 days. See our Refund & Return Policy for full details.

Yes — every completed order earns 1 point per $1 spent (plus 100 bonus points for your first order). Points convert to discounts on future orders three ways: a flat dollar discount, a percent-off coupon, or a “cheaper item free” cart bonus. As your lifetime points grow you advance through four tiers — Member → Researcher → Senior Researcher → Principal Investigator — each unlocking better earn rates and improved redemption rates. All loyalty members ship free at $75+ — below the storewide $100 — and Principal Investigators ship free on every order with no minimum. (Storewide: free standard shipping at $100+, free Priority at $250+.) Points expire 12 months from earning. Visit the Loyalty Program page for full tier benefits and your dashboard.