Peptide Sciences Alternatives: Who's Left and Who's Trustworthy
With Peptide Sciences gone, buyers are scrambling. We've ranked 28 suppliers by quality score, independent testing availability, and product overlap. No paid placements — just data.
How we rank suppliers
Trust scores factor in: COA/third-party testing availability, payment processor stability (credit card vs crypto-only), product catalog breadth, community feedback, and regulatory history. Scores are algorithmically generated — suppliers cannot pay to improve their rank.
Tier 1: Trust Score 70+ (11 suppliers)
Tier 2: Trust Score 55–69 (16 suppliers)
| Supplier | Country | Score | Products | COA |
|---|---|---|---|---|
| Particle Peptides | EU | 65/100 | 14 | — |
| Peptide Shop | EU | 65/100 | 7 | — |
| Licensed Peptides | GB | 65/100 | 12 | — |
| PharmaLabGlobal (EU) | GB | 65/100 | 0 | Yes |
| Biotech Peptides | US | 65/100 | 28 | — |
| Core Peptides | US | 65/100 | 103 | — |
| Limitless Life Nootropics | US | 65/100 | 11 | — |
| Swiss Chems | US | 65/100 | 12 | Yes |
| Sports Technology Labs | GB | 60/100 | 20 | — |
| The Peptide Market | GB | 60/100 | 7 | — |
| XL Peptides | GB | 60/100 | 12 | Yes |
| Apollo Peptide Sciences | US | 60/100 | 24 | — |
| Ascension Peptides | US | 60/100 | 16 | — |
| GeoPeptides | US | 60/100 | 50 | — |
| Verified Peptides | US | 60/100 | 40 | Yes |
| Behemoth Labz | US | 55/100 | 20 | — |
Red Flags: Vendors to Avoid Right Now
In the wake of Peptide Sciences' closure, expect an influx of new vendors and rebrand attempts. Watch for:
- •Clone sites — New domains using Peptide Sciences' old product images, descriptions, or layout. These are scams.
- •Crypto-only vendors — Legitimate operations maintain card processing. Crypto-only usually means they've been dropped by every payment processor.
- •“Former Peptide Sciences staff” — Anyone claiming insider credentials. No way to verify, high likelihood of scam.
- •Vendors without Finnrick or equivalent testing — Self-reported COAs are essentially meaningless. Look for independent customer-submitted samples.
For research and educational purposes only. Not medical advice. Trust scores are algorithmically generated from publicly available data. Suppliers cannot pay for placement or rank improvement. Last updated: March 7, 2026.