Head to head
PeptidePlugs vs ZC Labs
PeptidePlugs scores 86.3 of 100 against ZC Labs at 83.2. PeptidePlugs publishes more certificates: 103 against 39.
Same rubric, same date · 142 certificates between them · 19 compounds in common
| PeptidePlugs 86.3/100 Rank 8 of 58 | ZC Labs 83.2/100 Rank 11 of 58 VisitCodepepindex· 10% off | |
|---|---|---|
| Score0–100 on the published rubric | 86.3 Extensively documented | 83.2 Well documented |
| Evidence coverageShare of scored fields sourced | 90% | 84% |
| Certificates on fileLot records this index read | 103 | 39 |
| Testing laboratory | Freedom Diagnostics Testing | Freedom Diagnostics Testing |
| ISO/IEC 17025 | — | — |
| Label accuracyMean gap, labeled vs assayed | 10.6% | 9.1% |
| Basket price% of the peer median | 82% | 40% |
| 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. PeptidePlugs is cheaper on 1, ZC Labs on 15. The median column is the peer median across every vendor this index prices.
| Compound | PeptidePlugs | ZC Labs | Median |
|---|---|---|---|
| 5-Amino-1MQ | $1.80 | $0.59 | $2.20 |
| BPC-157 | $3.00 | $2.00 | $5.50 |
| DSIP | $4.00 | $2.00 | $7.90 |
| Epithalon | $4.00 | $0.68 | $3.92 |
| GHK-Cu | $0.40 | $0.14 | $0.60 |
| Glutathione | $0.03 | $0.02 | $0.05 |
| Ipamorelin | $4.00 | $2.00 | $6.00 |
| KPV | $4.00 | $2.00 | $5.25 |
| Melanotan I | $4.00 | $1.60 | $4.10 |
| Melanotan II | $4.00 | $1.60 | $4.00 |
| MOTS-c | $3.00 | $3.00 | $5.50 |
| NAD+ | $0.05 | $0.06 | $0.14 |
| Selank | $4.00 | $2.00 | $4.55 |
| Semax | $4.00 | $2.00 | $4.20 |
| SS-31 | $4.00 | $3.75 | $5.40 |
| TB-500 | $5.00 | $2.75 | $6.50 |
| Tesamorelin | $7.00 | $3.55 | $8.00 |
Which to pick
Pick PeptidePlugs if
you want the stronger documentation record of the two; you want the deeper certificate history (103 lots).
Pick ZC Labs if
you want the cheaper basket overall; you buy mostly the compounds it prices lower.
Questions
- Is PeptidePlugs or ZC Labs better?
- PeptidePlugs scores 86.3 of 100 against ZC Labs at 83.2. PeptidePlugs publishes more certificates: 103 against 39. Both figures come from the same published rubric over sourced data points, and each links to the document behind it.
- Which of PeptidePlugs and ZC Labs is cheaper?
- Across the 17 compounds both price, PeptidePlugs is cheaper on 1 and ZC Labs on 15. Price per milligram is compared at each vendor's own listed vial size.
- Who tests PeptidePlugs and ZC Labs peptides?
- PeptidePlugs: Freedom Diagnostics Testing. ZC Labs: Freedom Diagnostics Testing. A vendor-published certificate is recorded as a claim; only an independently commissioned assay counts as corroboration.
- How many certificates do PeptidePlugs and ZC Labs publish?
- PeptidePlugs has 103 lot-level certificates on file and ZC Labs has 39. Both counts are of certificates this index located and read, not of certificates claimed.
Both records were last re-verified on 2026-08-29 and 2026-08-18. 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.