Produção Nacional
Revisado por pares
Development of O/W emulsions containing Euterpe oleracea extract and evaluation of photoprotective efficacy
2014; UNIVERSIDADE DE SÃO PAULO; Volume: 50; Issue: 3 Linguagem: Inglês
10.1590/s1984-82502014000300024
ISSN2175-9790
AutoresCláudia Cecílio Daher, Ipojucan Silva Fontes, Rayllan de Oliveira Rodrigues, Gabriel Azevedo de Brito Damasceno, Daiane dos Santos Soares, Cícero Flávio Soares Aragão, A. Gomes, Márcio Ferrari,
Tópico(s)Antioxidant Activity and Oxidative Stress
ResumoEuterpe oleraceaMart. is a palm tree popularly known as açai, which is primarily found in northern Brazil. The açai's fruits contain anthocyanins, a class of polyphenols to which antioxidant properties have been attributed. The aim of this work was to develop O/W sunscreens emulsions containing açai glycolic extract (AGE) and to evaluate both their physical stability and photoprotective efficacy. Emulsions containing AGE and sunscreens were formulated using different types and concentrations of polymeric surfactant (acrylates/C 10-30 alkyl acrylate crosspolymer and sodium polyacrylate). The influence of two rheology modifiers (polyacrylamide (and) C13-14/isoparaffin (and) Laureth-7 and Carbomer) on the stability was also investigated. Physical stability was evaluated by preliminary and accelerated studies. Emulsions with 1.0% sodium polyacrylate were stable and exhibited non-newtonian pseudoplastic behavior and thixotropy. Photoprotective efficacy was evaluated by in vivo Sun Protection Factor (SPF) and determination of Protection Factor of UVA (PF-UVA). When AGE was added to the sunscreen emulsion, no significant increase in the in vivo SPF value was observed. The emulsion containing AGE showed PF-UVA = 14.97, 1.69 of the SPF/PF-UVA ratio and a critical wavelength value of 378 nm, and may therefore be considered a sunscreen with UVA and UVB protection.
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