publicado em 15/07/2012 às 15h38:00
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Antioxidant present in grapes and onions have natural sun protection factor

Rutin prevents damage from ultraviolet rays. Substance is also found in the savannah regions of trees and scrub

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A novel sunscreen that offers more sun protection, has antioxidant properties and presents a natural substance in your training routine is researched by the Faculty of Pharmaceutical Sciences (FCF) of USP. Rutin is found in trees in small and medium-sized regions of the Brazilian cerrado and caatinga. The substance is also present in onions, grapes and in red wine.

Rutin is a flavonoid, traditionally used as an antioxidant and vasoprotetor, which increases venous tone and reduces the capillary hipermeabilidade and edema formation, says the professor. It also acts to prevent the damage caused by ultraviolet radiation.

The results of this research indicate that the flavonoids have a tendency not to penetrate the stratum corneum of the epidermis, remaining on the skin surface. This led the researchers to use as an adjunct to routine systems sunscreens, because of its chemical structure similar to the filters on the market, and tends not to be absorbed through skin.

According to the professor of the Laboratory of Cosmetology, Department of Pharmacy, FCF, André T, the properties of phenolic compounds identified in the laboratory have contributed greatly to its application in sunscreens called protective photoactive. They present significant advantages in product performance with the incorporation of the substance of natural origin stands.

For the teacher Maria Valeria Robles Velasco, guiding research, research involving the development and analysis of bioactive sunscreens are in harmony with the global trend of using natural substances in cosmetic products. At the same time function as a strategy for increasing or maintaining the photoprotection efficacy, even by reducing the protection of conventional sunscreens, points.

The current stage of research is being directed for the association of flavonoid with traditional sunscreens such as methyl p-methoxycinnamate, benzophenone-3, avobenzone and octocrylene, among others, according to Professor Baby.

The main results of this study were obtained by in vitro tests performed in the laboratory. Among the various developments, the determination of efficacy in humans is the next step of the search.

With information <i> USP </ i>

   Palavras-chave:   Sunscreen    Rutin    An antioxidant    Cerrado    Caatinga    Grapes    Onions    São Paulo    USP    Universidade de São Paulo   
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