Trusted Peptide Sources
Vetted suppliers with third-party testing and verified purity
Every vendor listed here has been evaluated for product quality, testing transparency, shipping reliability, and customer service. These are the suppliers we reference throughout our guides.
Our Vetting Standards
We evaluate peptide suppliers on four criteria: third-party testing with published certificates of analysis, purity levels of 98% or higher, consistent product quality across orders, and responsive customer support. Vendors that fail to meet these standards are not listed. We update this page as supplier quality changes.
Optimum Formula (US)
Quality-focused supplier specializing in popular compounds at competitive prices. Known for their peptide blends and GLP-1 options. Strong reputation for product consistency and purity.
Best for: Researchers prioritizing proven compounds and blends
Discount: Code "BHACK" for 10% off
ResearchChemHQ (US)
Reliable US supplier with competitive pricing on popular peptides and GLP-1 compounds. Carries healing peptides, amino blends, and capsule options. Known for consistent quality and straightforward ordering.
Best for: US researchers wanting competitive prices on popular compounds
Discount: Code "BHACK" for 10% off
Modern Aminos (US)
Comprehensive US supplier with one of the largest peptide selections available. Carries healing peptides, GH secretagogues, cognitive compounds, and pre-made blends including the BPC-157/TB-500 combination. Fast domestic shipping.
Best for: US researchers wanting variety and fast shipping
Discount: Code "zach10" for 10% off
Limitless Life Nootropics (World-Wide)
Specializes in cognitive and neurological peptides alongside healing compounds. Offers unique delivery formats including nasal sprays and capsules. Strong selection of nootropic and longevity peptides not found elsewhere.
Best for: Cognitive peptides, nasal sprays, alternative delivery methods
Discount: Code "BHACK" for 15% off
BioLongevity Labs (US)
Specializes in longevity-focused peptides and unique compounds like Klotho and Follistatin. Also carries comprehensive healing and bioregulator selections. Offers proprietary capsule formulations.
Best for: Longevity peptides, specialty compounds, capsule formats
Discount: Code "BHACK" for 15% off
BioSLab (Canada)
Canadian supplier with strong selection of healing peptides, GH secretagogues, and bioregulators. Offers bundled options for common stacks. Reliable domestic shipping within Canada.
Best for: Canadian researchers wanting local sourcing
Discount: Code "BHACK" for 10% off
LimitlessBioChem (EU)
Premier European supplier with extensive selection across all peptide categories. Offers both injectable and capsule formats. Ships throughout the EU with reliable delivery times.
Best for: European researchers needing local shipping
Discount: Code "BHACK" for 10% off
Ready to Start Your Research?
Browse our comprehensive peptide guides to understand protocols, dosing, and what to expect before making any purchase decisions.
Disclaimer: This page contains affiliate links. We may earn a commission on purchases made through these links at no additional cost to you. All vendors are independently evaluated based on our stated criteria. Peptides are sold for research purposes only and are not approved for human use. Nothing on this page constitutes medical advice.