Purpose Driven → Precision
We started Tier One because we lived the problem. When the standard playbook fell short for our team, we chose discipline, data, and independent research. Now we provide premium research-grade materials so for those not served by the mainstream medical community.
MADE IN THE USA
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3RD PARTY TESTED
Tier One Biosystems was born from necessity. Our team was personally impacted when mainstream paths didn’t deliver clarity, so we became independent researchers—obsessed with reproducibility, documentation, and truth over hype. We supply U.S.–made, third-party-tested research materials with lot-level COAs so labs and investigators can run clean protocols with confidence. For laboratory research only. Not for human or diagnostic use.
BEST SELLERS
Proudly..
MADE IN THE USA
Tier One Tested, Tier One Trusted
Unleash your power
Tier One Biosystems brings next-generation research compounds and performance stacks—engineered to repair, recover, and amplify human potential.
Third-Party Tested
Every batch independently verified for purity, potency, and sterility.
Made in the USA
Domestic cGMP facilities ensure pharma-grade standards and rapid shipping.
Pharmaceutical-Grade Purity
Clinical-grade ingredients and clean-room compounding for uncompromising quality.
USA MADE
Money Back Guarantee
3rd party tested
>99% Pure
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Peptides are essential tools to reach incredible health optimization
Customers want to know
What are peptides?
Peptides are short chains of amino acids that function as the building blocks of proteins and play key roles in countless biological processes. Tier One Biosystems supplies peptides strictly for laboratory research and analytical purposes.
How do I use peptides?
All Tier One products are for research use only and are not for human consumption. We cannot provide usage or dosing instructions. Each product is shipped with verified specifications and third-party purity data for scientific reference.
Do I need a prescription to purchase Tier One peptides?
No prescription is required. Our compounds are sold exclusively for research and development and are not intended for therapeutic or diagnostic use.
How should I store my peptides?
Keep peptides sealed in a cool, dry environment, away from light. Certain peptides may require refrigeration; specific storage guidance is provided on each product page and confirmation email.
How long does shipping take?
Orders placed before 2:00 PM MST typically ship the same business day. Domestic packages are sent via FedEx 2Day or UPS 2-Day, arriving in about two business days. (P.O. box addresses ship via USPS Priority Mail.) Please note that severe weather or carrier issues can occasionally delay delivery.
Do you ship internationally?
Yes. We ship to many countries worldwide. International transit times and customs fees vary based on local regulations.
What payment methods do you accept?
Tier One Biosystems accepts major credit cards (Visa, MasterCard, American Express), as well as Zelle and Venmo for added convenience.
How can I contact customer service?
Our support team is ready to assist. Reach us anytime at support@tierone.bio or through the Contact page on our website.