U.S. Fulfilled
Not drop shipped overseas
Third-Party Tested
Every batch verified
Ships In 1–5 Days
No delays
No Backorders. Ever.
We only sell what's in stock
Ships In 1–3 Days
No delays
No Backorders. Ever.
We only offer what's in stock
Researcher Favorites
The compounds researchers order most. Manufactured, tested, and fulfilled in the USA.
BUNDLE STACK™
One Price. Your Compounds.
No Subscription.
Build your own stack from our full catalog. Complimentary reconstitution solution and free shipping included with every bundle.
Choose Your Stack
Choose 3 compounds for $349 or 6 compounds for $629.
Pick Your Compounds
Select any compounds from our full in-stock catalog.
We Handle The Rest
Complimentary reconstitution solution & free U.S. shipping included.
Why Choose Tier One Labs?
IN STOCK GUARANTEE
We only sell what’s physically in hand, so you never have to worry about backorders, delays, or uncertain availability.
LAB-GRADE QUALITY
U.S.-based provider sourcing from GMP-compliant manufacturers. Pharmaceutical-grade quality control at research-friendly pricing.
SAFE & PROTECTED SHIPPING
Our shipping keeps peptides stable. Discreet packaging with full tracking on every USA order.
EXPERT SUPPORT
Have questions about our products? Our knowledgeable team is here to help with real-time support whenever you need it.
99%+ PURITY GUARANTEED
Every batch tested by US labs via HPLC and Mass Spec. Full Certificate of Analysis available.
SHIPMENT PROTECTION
Every order includes free shipment protection. Lost, damaged, or stolen packages are reshipped at no cost.
Frequently Asked Questions
Please visit our FAQ page before reaching out to our customer support. Our team regularly updates this resource to provide you with the most up-to-date and comprehensive information, saving you valuable time.
What sets Tier One Labs apart from other peptide suppliers?
Tier One Labs is built on a foundation of quality, transparency, and operational reliability. We prioritize verified sourcing, third-party testing, and strict quality control to ensure consistency across every batch. Unlike many suppliers, we focus on maintaining dependable U.S.-based inventory, fast fulfillment, and a clean, professional customer experience. Our approach is simple — no inflated claims, no shortcuts, and no compromises on standards.
What does "Research Use Only" mean?
“Research Use Only” (RUO) means that products are intended strictly for laboratory research purposes and are not approved for any other use.
Can I modify or cancel my order?
Orders may be modified or canceled if they have not yet been processed. Please contact support as soon as possible for assistance.
Do you offer bulk or wholesale pricing?
Yes. For bulk orders or partnership inquiries, please contact us directly to discuss pricing and availability.
