“…Vitamin E is a well known hydrophobic antioxidant that is effective in many biological reactions; alpha-tocopherol, as the most potent stereoisomer of vitamin E, has been shown to scavenge peroxyl radicals, singlet oxygen, and superoxide anion radicals, thus acting as an important inhibitor of lipid peroxidation in membrane systems [15]. In human subjects, Uneri et al [16] showed comparable results, with prior studies, using topical vitamin E. CAPE is a biologically active ingredient of propolis with several interesting biological properties including: antioxidant, anti-inflammatory, antiviral, immunostimulatory, anti-angiogenic, anti-invasive, anti-metastatic and carcinostatic activities [7]; its molecular mechanisms have not been fully elucidated, however, CAPE is known to be a specific inhibitor of the transcription factor NF-kB [8]. Moreover, CAPE has been shown to induce apoptosis by activation of Fas in human breast cancer cells via NF-kB inhibition [17].…”