A diet rich in magnesium, polyphenols, and vitamin B is linked to decreased odds of depression in older adults over time.

The quality of black tea is often related to pigments called theaflavins and thearubigins. Chemical examination of the thearubigins shows that they are polymeric proanthocyanidins.

"Lychees contain proanthocyanidins, a type of antioxidant that contributes to health," she said. "These compounds have been studied for their potential to help lower LDL cholesterol, which is ...