It is not necessary to put cream half an hour before the sun

Researchers from the University of Malaga (UMA) claim that sunscreens are effective from the five minutes after application on the skin. The conclusions of their work were recently published in the Journal of the European Academy of Dermatology. This study dismantles the theory about the need to apply the cream half an hour before the sun.

For their development, the expert in photoprotection of the UMA, led by Enrique Herrera, techniques have been used in vitro in the laboratory, from where they carried out a follow up of the evolution of the cream for simulation solar, through measures of spectral transmission after the first minute, five, 10 and 30.

“Already in this first phase, we realized that the formula is stabilized and the photoresist is homogeneous and stable within five minutes of its application“, explain the promoters of the study.

Scientists, however, moved these initial results to a study with volunteers, using techniques of photography with flash emission of uv on specific areas of the back. “The conclusions were the same, and the absorption potential of the cream was stable from the same time” clarify the researchers.

Also, advise the application of high-protection sun cream every two hours because, usually, the amount that is normally used is not adequate -2 milligrams per square centimeter of skin– and their distribution tends not to be the correct one.

Last summer, researchers from the UMA Maria Victoria de Gálvez and José Aguilera, in collaboration with the Foundation of Healthy Skin from the Spanish Academy of Dermatology, developed the app UV-DERMA, a mobile application that calculates the time it takes to burn the skin to the sun. After his success, with nearly 45,000 downloads, the end of July to launch a new version translated to all languages for use in any part of the world.

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