Optimal Lab vs Zenterex
Optimal Lab has the higher PepFinder Score (8.1 vs 5.7). Both list 11 of the same peptides. Neither can pay to change the comparison.
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 Optimal LabVisit store |  ZenterexVisit store | |
|---|---|---|
| PepFinder Score | 8.1 | 5.7 |
| Trustpilot | No score found | No score found |
| Customer rating | No reviews yet | No reviews yet |
| Would order again | Needs 5+ reviews | Needs 5+ reviews |
| Product selection | 9.6/10 47 peptides · 263 products | 6.8/10 12 peptides · 12 products |
| Pricing and value | 6.0/10 In line with the average price per mg | Not rated yet |
| Delivery | 10.0/10 1to2 days | Not rated yet |
| Payment options | 7.0/10 CardPayPal | Not rated yet None found |
| Customer support | 10.0/10 EmailPhoneWhatsAppTelegram | 5.0/10 None found yet |
| Website experience | Not rated yet | Not rated yet |
| Reliability | 7.5/10 | 5.5/10 |
| Packaging | Not rated yet | Not rated yet |
| Ships from | United Kingdom | United Kingdom |
| Ships to | United Kingdom, Ireland | Austria, Australia, Belgium and 33 moreAustria, Australia, Belgium, Bulgaria, Canada, Switzerland, Cyprus, Czechia, Germany, Denmark, Estonia, Spain, Finland, France, United Kingdom, Greece, Croatia, Hungary, Ireland, Iceland, Italy, Liechtenstein, Lithuania, Luxembourg, Latvia, Malta, Netherlands, Norway, New Zealand, Poland, Portugal, Romania, Sweden, Slovenia, Slovakia, United States |
| Median price per mg | £2.50 | — |
| Reported delivered | No order reports | No order reports |
| Median delivery (reported) | Needs 3+ reports | Needs 3+ reports |
| Support replied (reported) | No support reports | No support reports |
The shaded cell is the higher rating in that row. Each rating's source (automated data, customer reviews or editorial) is shown on the supplier's profile.
Testing & transparency (optional detail)
| Optimal Lab | Zenterex | |
|---|---|---|
| Transparency Score | 6.8 | 7.1 |
| Testing transparency | 5.4 | 6.6 |
| Contact transparency | 10.0 | 10.0 |
| Documentation | 3.8 | 5.0 |
| Third-party testing stated | Not yet assessed | ✓ Yes |
| Publishes COAs | ✓ Yes | ✓ Yes |
| Batch-specific COAs | Not yet assessed | Not yet assessed |
| COAs reviewed by us | 0 | 0 |
| Verification | Not verified | Not verified |
| Years tracked | 0.1 | 0.1 |
| Refund policy clear | Not yet assessed | Not yet assessed |
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