title: Formulations of hydrogels and lipogels with vitamin E.
abstract: Vitamin E, a topically administered antioxidant, reduces erythema, photoaging, photocarcinogenesis, edema, and skin hypersensitivity associated with exposure to ultraviolet B (UVB) radiation. Virgin olive oil, which also has antioxidant properties, reduces the number of, and delays the onset of skin cancer induced by UVB radiation when used after sunbathing. Topical use after sunbathing of formulations that contain virgin olive oil and vitamin E may therefore reduce the number and delay the onset of UVB-related skin cancer in humans. We designed formulations of gels with olive oil (lipogels) and hydrogels containing 2% tocopherol. The formulations were optimized on the basis of rheological, organoleptic, biopharmaceutical, and cosmetic criteria. Different formulae for hydrogels with vitamin E were ideal for application after exposure to solar radiation because of their good organoleptic properties. Vitamin E lipogels are of potential use in cosmetics such as locally acting anti-aging treatments because of the antioxidant effects of vitamin E.
authors.affiliation: Department of Pharmacy and Pharmaceutical Technology, School of Pharmacy, University of Granada, 18071 Granada, Spain. vglara@ugr.es
authors.forename: V
authors.initials: V
authors.lastname: Gallardo
authors.forename: M
authors.initials: M
authors.lastname: Muñoz
authors.forename: M A
authors.initials: MA
authors.lastname: Ruíz