Influence of the absorption behavior of sunscreens in the short-wavelength UV range (UVB) and the long-wavelength UV range (UVA) on the relation of the UVB absorption to sun protection factor

The absorption of filter substances in sunscreens, reducing the incident ultraviolet (UV) radiation, is the basis for the protecting ability of such formulations. The erythema-correlated sun protection factor (SPF), depending mainly on the intensity of the UVB radiation, is the common value to quant...

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Bibliographic Details
Published in:Journal of Biomedical Optics 2010-09, Vol.15 (5), p.055008-055008
Main Authors: Weigmann, Hans-Jrgen, Schanzer, Sabine, Antoniou, Christina, Sterry, Wolfram, Lademann, Jrgen M
Format: Article
Language:English
Subjects:
Adult
Antioxidants
Effectiveness
Female
Formulations
Humans
In Vitro Techniques
Male
Middle Aged
Reagents
Skin - drug effects
Skin - injuries
Skin - metabolism
Skin - radiation effects
Spectra
Spectrophotometry, Atomic
Stripping
Sun
Sunburn - prevention & control
Sunscreening Agents - pharmacology
Superplastic forming
Ultraviolet Rays - adverse effects
Young Adult
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Summary:The absorption of filter substances in sunscreens, reducing the incident ultraviolet (UV) radiation, is the basis for the protecting ability of such formulations. The erythema-correlated sun protection factor (SPF), depending mainly on the intensity of the UVB radiation, is the common value to quantify the efficacy of the formulations avoiding sunburn. An method combining tape stripping and optical spectroscopy is applied to measure the absorption of sunscreens in the entire UV spectral range. The obtained relations between the short-wavelength UV (UVB) absorption and the SPF confirm a clear influence of the long-wavelength UV (UVA) absorption on the SPF values. The data reflect the historical development of the relation of the concentration of UVB and UVA filters in sunscreens and points to the influence of additional ingredients, e.g., antioxidants and cell-protecting agents on the efficacy of the products.
ISSN:1083-3668
1560-2281
DOI:10.1117/1.3497047