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Impact of Long‐Wavelength Ultraviolet A1 and Visible Light on Light‐Skinned Individuals
Author(s) -
Kohli Indermeet,
Zubair Raheel,
Lyons Alexis B.,
Nahhas Amanda F.,
Braunberger Taylor L.,
Mokhtari Mohsen,
Ruvolo Eduardo,
Lim Henry W.,
Hamzavi Iltefat H.
Publication year - 2019
Publication title -
photochemistry and photobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.818
H-Index - 131
eISSN - 1751-1097
pISSN - 0031-8655
DOI - 10.1111/php.13143
Subject(s) - erythema , ultraviolet , sunlight , dermatology , visible spectrum , skin cancer , medicine , ultraviolet radiation , ultraviolet a , broad spectrum , ultraviolet light , chemistry , photochemistry , optoelectronics , cancer , optics , materials science , physics , radiochemistry , combinatorial chemistry
Solar radiation is known to be a major contributor to the development of skin cancer. Most sunscreen formulations, including those with broad spectrum, offer minimal protection in long‐wavelength ultraviolet A1 (UVA1; 370–400 nm) and visible light (VL; 400–700 nm) domain. There is limited information regarding the impact of this broad waveband (VL + UVA1, 370–700 nm) on those with light skin. In this study, ten healthy adult subjects with Fitzpatrick skin phototypes I–III were enrolled. On day 0, subjects' lower back was exposed to a VL + UVA1 dose of 480 J cm −2 . A statistically significant increase in erythema immediately after irradiation compared with subjects' baseline nonirradiated skin was observed. Clinically perceptible erythema with VL + UVA1 is a novel finding since the erythemogenic spectrum of sunlight has primarily been attributed to ultraviolet B and short‐wavelength ultraviolet A (320–340 nm). The results emphasize the need for protection against this part of the solar spectra and warrant further investigation.

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