We all know getting a good night's sleep is vital to the healthy functioning of our bodies, but the importance of sleep goes much further than you might realize. According to research, the risk of getting dementia may go up as you get older if you don't get enough slow-wave sleep. A 2023 study found that over-60s are 27 percent more likely to develop dementia if they lose just 1 percent of this deep sleep each year. Slow-wave sleep is the third …