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Cosmetics 2019, 6(2), 25; https://doi.org/10.3390/cosmetics6020025

Use of Vegetable Oils to Improve the Sun Protection Factor of Sunscreen Formulations

Department of Drug Sciences, University of Catania, Viale A. Doria 6, 95125 Catania, Italy
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Received: 11 March 2019 / Revised: 28 March 2019 / Accepted: 1 April 2019 / Published: 8 April 2019
(This article belongs to the Special Issue Melanogenesis and Melanin-Related Compounds: A Cosmetic Perspective)
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Abstract

Some vegetable oils have many biological properties, including UV-absorbing capacity. Therefore, their use has been suggested to reduce the content of organic UV-filters in sunscreen products. In this work, we investigated the feasibility of developing oil-based vehicles with a high sun protection factor (SPF) using pomegranate oil (PMG) and shea oil (BPO) in association with different percentages of organic UV-filters (octyl– methoxycinnamate, butyl methoxydibenzoylmethane, and bemotrizinol). We characterized the spreadability, occlusion factor, pH, and required hydrophilic lipophilic balance of the resulting formulations, and did not observe relevant differences due to the incorporation of vegetable oils. The in vitro spectrophotometric determinations of SPF values highlighted that the addition of BPO (1% (w/w)) and PMG (1% (w/w)) resulted in an increase in SPF in comparison with the same formulations that contained only organic UV-filters. The SPF increase was more significant for the formulations that contained lower amounts of organic UV-filters. The results of this study supported the hypothesis that including suitable vegetable oils in sunscreen formulations could be a promising strategy to design products with a lower content of organic UV-filters. View Full-Text
Keywords: sunscreens; vegetable oils; sun protection factor; oil-based vehicles; occlusion; spreadability sunscreens; vegetable oils; sun protection factor; oil-based vehicles; occlusion; spreadability
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Montenegro, L.; Santagati, L.M. Use of Vegetable Oils to Improve the Sun Protection Factor of Sunscreen Formulations. Cosmetics 2019, 6, 25.

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