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Independent laboratory product-performance test

pigment regression study

A skin pigmentation regression test measured colour on the skin with a spectrophotometer before application and at days 1, 2, 4 and 7 after a single application.

key findings

  • Colour was measured with a Konica Minolta CM-2600 spectrophotometer in L*a*b* colour space at each time point.
  • The report records a mean total colour change (ΔE) of 13.78 at day 1 compared with baseline.
  • The report concludes that the lightness value (L*) fell 16% at day 1 and remained below baseline throughout, finishing 7% lower than baseline at day 7.
  • No adverse effects were observed during the study.
Material limitations

what this study does — and does not — show

  • The study was commissioned by Corium Health. It is a laboratory product-performance test, not a clinical outcome trial.
  • Eleven subjects, one shade, one body site and a single application. The report itself notes that further statistical analysis would be needed to determine significance.
  • Do not present the day-7 measurement as a wear-time guarantee for every person, body area or lifestyle.
  • It does not demonstrate disease treatment or broad safety across skin types.

original sources

The summary is an editorial reading aid. Use the original document for methods, statistics, authorship and disclosures. A publisher may restrict access to the full paper; publicly hosted PDFs are viewable here where available.

Pigment Regression Study — Eurofins Dermatest TR19020, original PDF

Source PDF · Public access

OPEN SOURCE PDF
Cosmetic camouflage addresses visible appearance. It does not replace diagnosis or medical treatment, and these findings are not a promise of individual benefit.
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