Head to head
PeptidePlugs vs Ascend Science
PeptidePlugs scores 90.7 of 100 against Ascend Science at 90.5, a gap narrow enough that either is defensible. PeptidePlugs publishes more certificates: 70 against 29.
Same rubric, same date · 99 certificates between them · 28 compounds in common
| PeptidePlugs 90.7/100 Rank 5 of 56 | Ascend Science 90.5/100 Rank 6 of 56 | |
|---|---|---|
| Score0–100 on the published rubric | 90.7 Extensively documented | 90.5 Extensively documented |
| Evidence coverageShare of scored fields sourced | 94% | 95% |
| Certificates on fileLot records this index read | 70 | 29 |
| Testing laboratory | FreedomDiagnostics | Kovera Labs and/or ILS Labs |
| ISO/IEC 17025 | — | Accredited |
| Label accuracyMean gap, labeled vs assayed | 10.5% | 7.1% |
| Basket price% of the peer median | 82% | 83% |
| Enforcement recordActions on record | None on record | None on record |
| Discount code | — | — |
Price, compound by compound
Price per milligram at each vendor’s own listed vial size. PeptidePlugs is cheaper on 12, Ascend Science on 15. The median column is the peer median across every vendor this index prices.
| Compound | PeptidePlugs | Ascend Science | Median |
|---|---|---|---|
| 5-Amino-1MQ | $1.80 | $0.90 | $2.90 |
| AHK-Cu | $0.50 | $0.50 | $0.70 |
| AOD-9604 | $12 | $9.10 | $11 |
| ARA-290 | $5.00 | $4.90 | $5.50 |
| BPC-157 | $3.00 | $4.90 | $5.50 |
| Cagrilintide | $6.00 | $5.95 | $10 |
| DSIP | $4.00 | $7.00 | $7.00 |
| Epithalon | $4.00 | $3.85 | $3.92 |
| GHK-Cu | $0.40 | $0.45 | $0.59 |
| Glutathione | $0.03 | $0.04 | $0.05 |
| Ipamorelin | $4.00 | $4.90 | $6.20 |
| Kisspeptin | $5.00 | $3.85 | $5.12 |
| KPV | $4.00 | $4.55 | $5.00 |
| LL-37 | $12 | $5.25 | $12 |
| Melanotan I | $4.00 | $3.85 | $4.10 |
| Melanotan II | $4.00 | $3.50 | $4.00 |
| MOTS-c | $3.00 | $4.55 | $4.70 |
| NAD+ | $0.05 | $0.10 | $0.14 |
| Pinealon | $4.00 | $4.20 | $4.70 |
| Selank | $4.00 | $4.90 | $4.50 |
| Semax | $4.00 | $4.50 | $4.10 |
| Sermorelin | $5.50 | $5.00 | $7.20 |
| SNAP-8 | $5.00 | $3.50 | $4.00 |
| SS-31 | $4.00 | $5.25 | $5.40 |
| TB-500 | $5.00 | $4.90 | $6.20 |
| Tesamorelin | $7.00 | $6.30 | $8.00 |
| Thymosin Alpha-1 | $6.00 | $5.25 | $7.60 |
| VIP | $6.00 | $4.20 | $8.20 |
Which to pick
Pick PeptidePlugs if
you want the stronger documentation record of the two; you want the deeper certificate history (70 lots); you want the cheaper basket overall.
Pick Ascend Science if
an accredited testing laboratory matters to you; you buy mostly the compounds it prices lower.
Questions
- Is PeptidePlugs or Ascend Science better?
- PeptidePlugs scores 90.7 of 100 against Ascend Science at 90.5, a gap narrow enough that either is defensible. PeptidePlugs publishes more certificates: 70 against 29. Both figures come from the same published rubric over sourced data points, and each links to the document behind it.
- Which of PeptidePlugs and Ascend Science is cheaper?
- Across the 28 compounds both price, PeptidePlugs is cheaper on 12 and Ascend Science on 15. Price per milligram is compared at each vendor's own listed vial size.
- Who tests PeptidePlugs and Ascend Science peptides?
- PeptidePlugs: FreedomDiagnostics. Ascend Science: Kovera Labs and/or ILS Labs. A vendor-published certificate is recorded as a claim; only an independently commissioned assay counts as corroboration.
- How many certificates do PeptidePlugs and Ascend Science publish?
- PeptidePlugs has 70 lot-level certificates on file and Ascend Science has 29. Both counts are of certificates this index located and read, not of certificates claimed.
Both records were last re-verified on 2026-09-30 and 2026-09-29. 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.