Peptides and SARMS for Sale
- Tested by MZ Biolabs for identity, purity, and concentration
- 100% products made, company owned and operated in the USA
Fast Delivery
We process and ship all orders the next business day, ensuring you receive your research products quickly and reliably.
Free Shipping
Enjoy free shipping on all U.S. orders totaling $300 or more—delivered securely and on time.
Dedicated Support
Our team is here to help with questions, orders, or product details. We value every customer and stand behind every shipment.
99%+ Purity
Each OptiBuild peptide is tested to exceed 99% purity, backed by Certificates of Analysis for complete transparency and trust.
Precision-Built Peptides for Advanced Research
OptiBuild delivers ultra-pure, laboratory-grade peptides trusted by researchers and scientists worldwide. Every batch is verified for over 99% purity, supported by Certificates of Analysis, and proudly manufactured in the USA. We combine scientific precision with transparency to help you achieve reliable, repeatable results in every study.
Popular Peptides
New Peptides
Exceptional Purity and Consistency
I’ve worked with a number of peptide suppliers, and OptiBuild has quickly become my go-to. Every batch arrives with clear documentation and lab verification above 99% purity, which is exactly what we need for precision work. The consistency between orders has been remarkable—no unexpected variations, no quality issues. It’s rare to find a supplier this transparent and dependable.
Trusted by Our Research Team
Our team shifted to OptiBuild peptides after facing inconsistency from other suppliers, and the improvement has been significant. The peptides dissolve cleanly, perform predictably in assays, and the Certificate of Analysis for each product gives us total confidence. Communication with the support team has been quick and professional. OptiBuild has become a key part of our research process.
Transparency You Can Count On
The transparency that OptiBuild provides is outstanding. Every order includes detailed purity data and Certificates of Analysis, so there’s no guesswork or uncertainty about what you’re using. I appreciate that they’re upfront about sourcing and testing—it’s the kind of professionalism that builds real trust. You can tell they care about their reputation and their customers.