Peptide Sciences
Peptide Sciences is one of the largest and longest-running US-based peptide suppliers, operating out of Henderson, Nevada since 2012. They offer over 100 research peptides with claimed purity of 99% or higher, supported by in-house HPLC and mass spectrometry testing. The company is well-known in the research peptide community for its extensive catalog spanning nearly every major peptide category, professional packaging, and same-day order processing. While their COAs are produced internally rather than by independent third-party laboratories, they remain one of the most frequently recommended vendors on peptide research forums.
Score Breakdown
Weighted scoring: COA Quality (20%), Transparency (15%), Community Reputation (15%), Product Range (10%), Pricing (10%), Shipping Speed (10%), Website Experience (10%), Payment Flexibility (10%)
Pros & Cons
Pros
- Largest US peptide catalog (100+ peptides)
- Established since 2012
- 99%+ purity claims
- Fast domestic shipping with same-day processing
- Professional website and packaging
Cons
- Internal COAs only (no third-party verification)
- Premium pricing
- Credit card only payment
- Strict no-refund policy
Certificate of Analysis (COA)
COAs are produced in-house. No independent third-party verification is provided. Each product page includes a downloadable COA showing purity and identity results.
Shipping Information
Shipping Information
Payment Methods
Credit card is the only accepted payment method. No crypto, PayPal, or alternative payment options are available.
Peptides Available
Quick Facts
- Type
- US Domestic
- Location
- Henderson, NV, USA
- Founded
- 2012
- Website
- www.peptidesciences.com
- Last Verified
- 2026-02-09
- Overall Score
- 7.0
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Peptides (37)
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