Retatrutide vs Tirzepatide is the most asked question among US research peptide buyers in 2026. Retatrutide is a triple receptor agonist (GLP-1, GIP and glucagon), while Tirzepatide targets dual receptors (GLP-1 and GIP). Both are available from Apex Vials with US domestic shipping to all 50 states in 24–48 hours.
Apex Vials ships all research peptides from our US domestic warehouse. Orders are dispatched within 24 hours and delivered to all 50 US states via USPS Priority Mail (1–3 days), UPS Ground (1–2 days) or FedEx Express (overnight). Free shipping on USPS and UPS orders over $300. Free FedEx on orders over $500.
Apex Vials is one of the only US research peptide suppliers offering a 10% Bitcoin discount. Select Bitcoin at checkout and your discount is applied automatically to your entire order.
Apex Vials accepts Zelle, CashApp, Chime and Apple Pay on all orders. Bitcoin orders receive an automatic 10% discount. Payment details are always sent securely by email or WhatsApp after ordering — never displayed on our website.