Life Link Research and EZ Peptides are both US-based research peptide suppliers operating in 2026 after the major industry shutdowns. They serve overlapping researcher segments but with different positioning: EZ competes on price, LLR competes on documentation depth.
Quick Comparison
| Factor | Life Link Research | EZ Peptides |
|---|---|---|
| COA standard | Six-panel third-party independent | Third-party on core products, varies elsewhere |
| GLP-1 range | Full (sema, tirz, reta, CagriSema) | Limited; retatrutide and CagriSema not consistently stocked |
| Classic peptides (BPC-157, TB-500, CJC-1295) | Stocked, third-party COA | Stocked, competitive pricing |
| SARMs in catalog | No | No |
| US shipping | 2-4 business days | Yes |
EZ Peptides is a reasonable budget option for researchers focused on classic peptides where their pricing is competitive. For GLP-1 research requiring the newer compounds (retatrutide, CagriSema) and rigorous independent documentation, Life Link Research has the more complete coverage profile.
When to Choose Each
Choose Life Link Research if your research requires independently verified COAs, needs the full GLP-1 incretin range, or is destined for publication.
Choose EZ Peptides if your research is limited to classic peptides and price is the primary criterion.
FAQs
Are EZ Peptides COAs third-party?
On core products, yes. Documentation depth on newer compounds is less developed than LLR’s standard.
Does EZ Peptides stock retatrutide?
Inconsistently as of 2026. Verify current stock before ordering.
View Life Link Research products →
For research purposes only. Not for human use.