Cited by 197Skin Protection and Agingmelanin and skin pigmentationTiO2 Photocatalysis and Solar Cells

Photodegradation of avobenzone: Stabilization effect of antioxidants

Afonso, S., Horita, K., Sousa e Silva, J.P., Almeida, I.F., Amaral, M.H., Lobão, P.A., Costa, P.C., Miranda, Margarida S. +2 more·2014·Journal of Photochemistry and Photobiology B: Biology

Abstract

Avobenzone is one of the most common UVA-filters in sunscreens, and is known to be photounstable. Some of the strategies used to stabilize this filter present some drawbacks like photosensitization reactions. Antioxidants are widely used as cosmetic ingredients that prevent photoageing and complement the photoprotection offered by the UV-filters preventing or reducing photogenerated reactive species. The purpose of this work was to study the effect of antioxidants in the photostabilization of avobenzone. The filter dissolved in dimethyl sulfoxide or incorporated in a sunscreen formulation was irradiated with simulated solar radiation (750 W/m(2)). The tested antioxidants were vitamin C, vitamin E, and ubiquinone. The area under the curve of the absorption spectrum for UVA range and the sun protection factor (SPF) were calculated. Vitamin E (1:2), vitamin C (1:0.5) and ubiquinone (1:0.5) were the more effective concentrations increasing the photostability of avobenzone. In sunscreen formulations, the most effective photostabilizer was ubiquinone which also promoted an increase in SPF. This knowledge is important to improve effectiveness of sunscreen formulation. Antioxidants can be valuable ingredients for sunscreens with a triple activity of filter stabilization, SPF boosting and photoageing prevention.

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Crossref · 10.1016/j.jphotobiol.2014.07.004

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  • Antioxidants vitamin C, vitamin E, and ubiquinone used concomitantly improve the photostability of avobenzone, and ubiquinone improves the SPF value of the formulation.

    “Afonso et al. (2014) reported the stabilising effect of antioxidants, namely vitamin C, vitamin E, and ubiquinone, when used concomitantly in the formulation, which improved the photostability of avobenzone (11) with antioxidant concentrations of 10 µg/mL, 2.5 µg/mL, and 2.5 µg/mL, respectively, as well as the improvement of the SPF value of the formulation with ubiquinone [29].”

    From UV Filters: Challenges and Prospects (2022) · cites this paper as [29]

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Authors
Afonso, S., Horita, K., Sousa e Silva, J. P., Almeida, I. F., Amaral, M. H., Lobão, P. A., Costa, P. C., Miranda, M. S., Esteves da Silva, J. C. G., & Sousa Lobo, J. M.
Affiliations
Universidade do Porto (PT)
Venue
Journal of Photochemistry and Photobiology B: Biology
Publisher
Elsevier BV
Published
2014-11
Volume
140
Pages
36-40
ISSN
1011-1344 (ISSN-L)
OpenAlex
W2063185930
Cited by
197
References
28
Citations by year
2026: 20 · 2025: 16 · 2024: 18 · 2023: 22 · 2022: 14 · 2021: 21 · 2020: 26 · 2019: 12 · 2018: 13 · 2017: 13 · 2016: 12 · 2015: 9 · 2014: 1
FWCI
12.76
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Photochemistry and Photobiology B Biology (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Dermatology › Skin Protection and Aging
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Cell Biology › melanin and skin pigmentation
  • Physical Sciences › Energy › Renewable Energy, Sustainability and the Environment › TiO2 Photocatalysis and Solar Cells
Keywords
avobenzone, photodegradation, photostabilization, antioxidants, vitamin C, vitamin E, coenzyme Q10, UVA filters, sunscreen formulation, sun protection factor, reactive oxygen species
MeSH terms
Antioxidants, Ascorbic Acid, Chemistry, Pharmaceutical, Dimethyl Sulfoxide, Drug Stability, Photolysis, Propiophenones, Sunscreening Agents, Ubiquinone, Ultraviolet Rays, Vitamin E, Sun Protection Factor

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