Independent testing verdict Pass
This product matched its label.
Identity confirmed and measured purity of 98% met the stated ≥99% claim. Content measured 101.2% of label.
- Identity verified
- Yes
- Measured purity
- 98.0%
- Content accuracy
- 101.2%
- Test recency
- Older result
Mass spectrometry confirmed the labelled compound
Label claimed ≥99%
5.06mg measured against 5mg claimed
Published 17 months ago
Specimen PI-LAB-2025-129 Tested by Cornerstone Analytical 15 samples tested from this company Purity & Testing score 99/100
Full laboratory evidence Findings table, methodology, chain of custody and the original report
Findings
| Metric | Label claim | Measured | Assessment |
|---|---|---|---|
| Purity (HPLC) | ≥ 99% | 98% | Within analytical tolerance |
| Identity (MS) | TB-500 | Confirmed | Matches label |
| Content | 5 mg | 5.06 mg | Within 5% of label |
Methodology & chain of custody
Reversed-phase HPLC purity analysis with UV detection at 214nm.
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
- A5611-25
- Purchased
- Analysed
- Published
- Laboratory
- Cornerstone Analytical
- Test type
- Purity & identity
Original laboratory report: PI-LAB-2025-129-report.pdf