Independent testing verdict Pass
This product matched its label.
Identity confirmed and measured purity of 94.1% met the stated ≥95% claim. Content measured 100.7% of label.
- Identity verified
- Yes
- Measured purity
- 94.1%
- Content accuracy
- 100.7%
- Test recency
- Older result
Mass spectrometry confirmed the labelled compound
Label claimed ≥95%
10.07mg measured against 10mg claimed
Published 20 months ago
Specimen PI-LAB-2025-080 Tested by Cornerstone Analytical 20 samples tested from this company Purity & Testing score 87/100
Full laboratory evidence Findings table, methodology, chain of custody and the original report
Findings
| Metric | Label claim | Measured | Assessment |
|---|---|---|---|
| Purity (HPLC) | ≥ 95% | 94.1% | Within analytical tolerance |
| Identity (MS) | KPV | Confirmed | Matches label |
| Content | 10 mg | 10.07 mg | Within 5% of label |
Methodology & chain of custody
Quantitative amino acid analysis against certified reference standard.
The sample was purchased anonymously through standard retail checkout and shipped to an unaffiliated address, then logged, photographed, and forwarded under chain-of-custody documentation to Cornerstone Analytical. See our full testing methodology.
- Lot / batch
- L8382-25
- Purchased
- Analysed
- Published
- Laboratory
- Cornerstone Analytical
- Test type
- Purity & identity
Original laboratory report: PI-LAB-2025-080-report.pdf