ResearchVerify

When more than one lab tests the same batch, we line up their results side by side. When they match, it is the strongest signal you can get. When they do not, that is information too. Here is what these labs found — you decide.

3 independent labs tested this batch of Retatrutide from Nexaph. Their purity results ranged from 99.6% to 99.8%.
The labs agree

Independent labs landed within 2 points of each other on purity. That is the strongest signal you can get on a batch.

On the actual amount per vial, the labs were close (25.7 to 31.1 mg).

⚠ One lab came back sharply different from the rest (flagged and highlighted in the table below). It counts toward the range above but is pulled out of the agreement math.

✓ Multi-Lab Verified · Poor · 5.2

The two badges above are our blended RV-score view: whether the scores agree, and the overall quality tier. The plain read at the top leads with the labs actual purity numbers, and the full per-lab table is below.

Retatrutide from Nexaph
vendor batch label "RET2404212025-04" · cross-tested by 3 independent labs

Independent labs agree on this batch within 0.5 RV-score points. Strong cross-validation.

ⓘ Batch identity basis: Vendor-claimed batch: 'RET2404212025-04'
Grouped by the vendor's batch label. We don't independently verify lot identity — if multiple physical lots were sold under this label, they'd be lumped together here. Use the agreement signal with appropriate caution.
Labs
3
Tests
6
1 unparsed
RV Score Mean
5.23
RV Score Spread
0.18
Content Mean
28.8 mg
Content moderate
Content Range
25.7–31.1 mg
CV 7.2%

Per-Lab Breakdown

All rows (Purity & Content vary, everything else constant): Testing 3.1 · Label 7.0 · CI 10.0
LabTaskTest DateRVPurityContentTestingLabelCustodyCIMethod
Chromate#FNR-uasp22j5.2099.728%29.9 mg3.17.04.310.0HPLC ~
Chromate#FNR-pl1zuvm5.2099.836%30.3 mg3.17.04.310.0HPLC ~
JanoshikOUTLIER#656155.3899.55%29.7 mg3.17.05.210.0not stated by lab
Janoshik#FNR-y0si2t15.2099.84%31.1 mg3.17.04.310.0HPLC ~
Krause Analytical#FNR-w4gvrj75.2099.82%25.7 mg3.17.04.310.0HPLC ~
Krause Analytical#FNR-z9sv7o45.2099.67%26.2 mg3.17.04.310.0HPLC ~

Unparsed records (1) — excluded from agreement math

LabTaskTest DateStatus
Janoshik#6561726 MAY 2025unparseable — excluded from agreement math

These records lack parseable score, purity, and content fields. They're shown here for transparency but don't contribute to the cross-lab agreement statistics above.

Outlier detected. One or more records in this group are statistically unusual (|z-score| > 2.0) compared to the others. Highlighted rows above show the flagged tests. Common causes: differing test methods, lab calibration drift, sample handling, or a genuinely heterogeneous batch.
Why this matters: A single COA is one lab's answer from one method on one sample. Multiple labs reveal the pattern. When labs converge on the same answer, that's strong cross-validation. When they diverge — especially on content while agreeing on purity — the difference is often method-driven (different quantitation basis) but sometimes signals real product variation. ResearchVerify is the only platform that surfaces both cases automatically across thousands of cross-tests.