Lutein which is a nutrient found in green leafy vegetables such as spinach and kale, as well as avocados and eggs -- had neural responses that were more on par with younger individuals than with their peers.

Increasing the levels of a signaling molecule found in the brain can positively alter response to stress, revealing a potential new therapeutic target for treatment of depression, researchers report.

As we grow old, our nights are frequently plagued by bouts of wakefulness, bathroom trips and other nuisances as we lose our ability to generate the deep, restorative slumber we enjoyed in youth. But does that mean older people just need less sleep? Read more