Oleuropein, found in olive leaves and oil, exerts antioxidant, anti-inflammatory and anti-atherogenic effects through direct inhibition of PPARγ transcriptional activity^[1]. Oleuropein induces apoptosis in breast cancer cells via the p53-dependent pathway and through the regulation of Bax and Bcl2 genes. Oleuropein also inhibits aromatase^[2]. In Vitro: Aromatase, a cytochrome P450 enzyme, is an important pharmacological target in breast cancer therapy^[2].