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- Title
Long-Lasting Pigmentation More than Its Intensity Is a Reliable Indicator of Skin Sun Resistance.
- Authors
Procaccini, Enrico M.; Napolitano, Alessandra; Panzella, Lucia; Prizio, Emilia; Monfrecola, Giuseppe
- Abstract
Background: The currently adopted method for predicting sun sensitivity is Fitzpatrick’s classification which however is based on self-reported burning tendency and tanning ability. Objective: Determination of the individual UV susceptibility based on non-subjective parameters. Method: Minimal erythema dose (MED), intensity and duration of pigmentation on days 5, 9 and 16 following 1 MED and the levels of the melanin marker pyrrole-2,3,5-tricarboxylic acid (PTCA) were analysed in non-red-haired subjects (50, aged 20–46 years). Results: Phenotype groups or phototypes showed a good correlation with PTCA yields and the persistence of pigmentation on day 16, but not with MED values. MED values did not show a significant correlation with PTCA yields. On the other hand, high values on day 16 were exhibited only by subjects having PTCA values higher than 200 ng/mg. Conclusions: Measurement persistence of pigmentation on day 16 represents a non-invasive and easy-to-perform method to evaluate photoprotection in those individuals escaping straightforward classification based on phenotype or anamnesis. Copyright © 2007 S. Karger AG, Basel
- Publication
Dermatology (10188665), 2007, Vol 215, Issue 3, p173
- ISSN
1018-8665
- Publication type
Article
- DOI
10.1159/000106572