ABSTRACT
Dietary polyphenols have attracted the interest of researchers due to their effects on human health. Differents studies have shown that polyphenolic compounds are strong antioxidants in vitro and in vivo—even more than vitamins E or C. Additionally, they play a key role in the prevention of degenerative diseases such as cardiovascular diseases and cancer. The antioxidant mechanisms of polyphenols are not yet fully understood, but it is clear that they go beyond the modulation of oxidative stress biomarkers. The antioxidant power of polyphenols can be evaluated by different methods, from chemical or in vitro testing, that also may help to predict the potencial bioactivity of polyphenols in vivo.
