A consumer-advocacy business had one unit of a baby mineral sunscreen lotion, SPF 50 tested by a commercial laboratory for lead, cadmium, mercury and arsenic and published the report. The published headline is: “Testing Baby Bum Mineral Sunscreen Lotion, SPF 50 for Lead, Cadmium, Mercury, & Arsenic with Third Party, Independent, Laboratory Testing”. This page reports the result by laboratory case number.
Key numbers
Laboratory report image, PDF p. 22. Case 2506212-01, received 06/11/2025, tested 06/12/2025, completed 06/13/2025. Units are ppb (µg/kg) in the product as received.
| Analyte | Result (ppb) | Method |
|---|---|---|
| Lead | 495.1 | ICP-MS |
| Cadmium | 232.4 | ICP-MS |
| Arsenic (total) | < 10.00 | ICP-MS |
| Mercury (total) | < 5.00 | ICP-MS |
The same test appears as row 20 of the 2026 comparison chart with the same values. The chart prints ”?” for the zinc percentage of this product. Ledger rows MBS-0162 to MBS-0165.
Methods (brief)
The unit was sent to the laboratory with an anonymised sample description and an internal lot number, and the report was annotated with the product name afterwards. The report states ICP-MS and prints reporting limits through the less-than values. It does not describe the digestion, sample mass, recovery or quality control. The OCR text layer renders the arsenic and mercury signs as ”=”; values here are read from the report image.
Evidence fitness
The report supports one measured result for each metal in one unit as sold. It is useful as a data point alongside other sources and as a record of the reporting limits used. It does not describe other lots, the brand’s current product, or the fraction of metal that crosses infant skin. Arsenic and mercury are totals.
Limitations
One unit, one laboratory, no replicate and no method detail. Grey literature. The same result is also printed on the comparison chart and must be counted once.
Related evidence
- Baby Sunscreen, Mineral (ZnO + TiO2)
- Chart Comparing the Toxicant Profiles of Popular Sunscreen Products
- Lead
- Cadmium
Update history
No substantive edit history is available in this build. The full commit record is available in git.