Preliminary studies towards utilization of various plant extracts as antisolar agents.
Synopsis The aim of this work was to evaluate several plant extracts with regard to ultraviolet absorption spectra in view of a possible application as antisolar agents. Liquid and dry extracts of Hamamelis virginiana, Matricaria recutita, Aesculus hippocastanum, Rhamnus purshiana and Cinnamomum zeylanicum were prepared by repercolation, maceration and microwave oven extraction. UVB absorption spectra (290-320nm) were obtained and the solar protection factors (SPF) of these preparations were determined by a spectrophotometric method. The results showed that after incorporation to a 2% solution of the synthetic sunscreen octylmethoxycinnamate, the extracts showed an intensification in SPF values, suggesting that this can be an interesting method to intensify SPF. In addition, these extracts can contribute their emollient and moistening properties to the product. These are important characteristics for protecting skin against exposure to the sun.
Ramos
M F
MF
Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Centro de Ciências da Saúde Bloco K 2 andar sala 50, CEP: 21910-240, Rio de Janeiro, Brasil.
Santos
E P
EP
Bizarri
C H
CH
Mattos
H A
HA
Padilha
M R
MR
Duarte
H M
HM