Foods like ginger, dark berries, and olive oil help protect and preserve the brain’s glial cells — essential for the health of the central and peripheral nervous systems. Glial cells outnumber nerve cells in the brain three to one, and they serve a range of neurological functions such as controlling the rate of nerve signals, providing a “scaffold” for aspects of neural development, and assisting in the rehabilitation from a neural injury. Glial cells are like the street sweepers of the brain; they take in diseased or damaged cells and remove them. However, recent research showed that when glial cells failed to release certain chemicals, the brain’s neurons committed “the biochemical version of suicide,” which leads to a loss of cognitive functioning. So do what you can to protect those glial cells.