Head to head
Ascend Science vs PeptidePlugs
Ascend Science scores 86.7 of 100 against PeptidePlugs at 86.3, a gap narrow enough that either is defensible. Ascend Science tests at an ISO/IEC 17025-accredited laboratory and PeptidePlugs does not.
Same rubric, same date · 130 certificates between them · 31 compounds in common
| Ascend Science 86.7/100 Rank 5 of 58 VisitCodePEPINDEX· 15% off | PeptidePlugs 86.3/100 Rank 8 of 58 | |
|---|---|---|
| Score0–100 on the published rubric | 86.7 Extensively documented | 86.3 Extensively documented |
| Evidence coverageShare of scored fields sourced | 91% | 90% |
| Certificates on fileLot records this index read | 27 | 103 |
| Testing laboratory | Kovera Labs and/or ILS Labs | Freedom Diagnostics Testing |
| ISO/IEC 17025 | Accredited | — |
| Label accuracyMean gap, labeled vs assayed | 25.5% | 10.6% |
| Basket price% of the peer median | 83% | 82% |
| Enforcement recordActions on record | None on record | None on record |
| Discount code | PEPINDEX | — |
Price, compound by compound
Price per milligram at each vendor’s own listed vial size. Ascend Science is cheaper on 15, PeptidePlugs on 12. The median column is the peer median across every vendor this index prices.
| Compound | Ascend Science | PeptidePlugs | Median |
|---|---|---|---|
| 5-Amino-1MQ | $0.90 | $1.80 | $2.20 |
| AHK-Cu | $0.50 | $0.50 | $0.70 |
| AOD-9604 | $9.10 | $12 | $11 |
| ARA-290 | $4.90 | $5.00 | $5.72 |
| BPC-157 | $4.90 | $3.00 | $5.50 |
| Cagrilintide | $5.95 | $6.00 | $12 |
| DSIP | $7.00 | $4.00 | $7.90 |
| Epithalon | $3.85 | $4.00 | $3.92 |
| GHK-Cu | $0.45 | $0.40 | $0.60 |
| Glutathione | $0.04 | $0.03 | $0.05 |
| Ipamorelin | $4.90 | $4.00 | $6.00 |
| Kisspeptin | $3.85 | $5.00 | $5.20 |
| KPV | $4.55 | $4.00 | $5.25 |
| LL-37 | $5.25 | $12 | $12 |
| Melanotan I | $3.85 | $4.00 | $4.10 |
| Melanotan II | $3.50 | $4.00 | $4.00 |
| MOTS-c | $4.55 | $3.00 | $5.50 |
| NAD+ | $0.10 | $0.05 | $0.14 |
| Pinealon | $4.20 | $4.00 | $4.40 |
| Selank | $4.90 | $4.00 | $4.55 |
| Semax | $4.50 | $4.00 | $4.20 |
| Sermorelin | $5.00 | $5.50 | $7.40 |
| SNAP-8 | $3.50 | $5.00 | $4.25 |
| SS-31 | $5.25 | $4.00 | $5.40 |
| TB-500 | $4.90 | $5.00 | $6.50 |
| Tesamorelin | $6.30 | $7.00 | $8.00 |
| Thymosin Alpha-1 | $5.25 | $6.00 | $7.60 |
| VIP | $4.20 | $6.00 | $8.20 |
Which to pick
Pick Ascend Science if
you want the stronger documentation record of the two; an accredited testing laboratory matters to you; you buy mostly the compounds it prices lower.
Pick PeptidePlugs if
you want the deeper certificate history (103 lots); you want the cheaper basket overall.
Questions
- Is Ascend Science or PeptidePlugs better?
- Ascend Science scores 86.7 of 100 against PeptidePlugs at 86.3, a gap narrow enough that either is defensible. Ascend Science tests at an ISO/IEC 17025-accredited laboratory and PeptidePlugs does not. Both figures come from the same published rubric over sourced data points, and each links to the document behind it.
- Which of Ascend Science and PeptidePlugs is cheaper?
- Across the 28 compounds both price, Ascend Science is cheaper on 15 and PeptidePlugs on 12. Price per milligram is compared at each vendor's own listed vial size.
- Who tests Ascend Science and PeptidePlugs peptides?
- Ascend Science: Kovera Labs and/or ILS Labs. PeptidePlugs: Freedom Diagnostics Testing. A vendor-published certificate is recorded as a claim; only an independently commissioned assay counts as corroboration.
- How many certificates do Ascend Science and PeptidePlugs publish?
- Ascend Science has 27 lot-level certificates on file and PeptidePlugs has 103. Both counts are of certificates this index located and read, not of certificates claimed.
Both records were last re-verified on 2026-08-18 and 2026-08-29. Every figure is computed from the same rubric over sourced data points; see the methodology or the full best peptide vendors ranking. Partner links are marked and cannot affect a score.