Procurement comparison
Vendor comparison summary table
Factor Prime Peptides Peptide Sciences Limitless Life Swiss Chems International Quality Tier Mid High-Mid Variable Typical Purity 92-98% 95-99% 90-97% 70-99% Price Range $$ $$$ −- −$ $ Shipping Speed (US) 3-7 days 14-45 days Customer Service Moderate Good Poor
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- Factor
- Prime Peptides
- Peptide Sciences
- Limitless Life
- Swiss Chems
- International
- Quality Tier
- Mid
- High-Mid
- Variable
- Typical Purity
- 92-98%
- 95-99%
- 90-97%
- 70-99%
- Price Range
- $$
- $$$
- −- −$
- $
- Shipping Speed (US)
- 3-7 days
- 14-45 days
- Customer Service
- Moderate
- Good
- Poor-Variable
- Product Selection
- Broad
- Comprehensive
- Very Broad
- Extremely Broad
- Testing Transparency
- Best For
- Budget-conscious quality seekers
- Quality prioritizers
- Education seekers
- Multi-category shoppers
- Bulk/research buyers