A good night’s sleep is essential for overall health and fitness. When you sleep, your body rejuvenates and repairs itself. It consolidates learning and memories and removes waste. Muscles are repaired. There is much more going on inside your body when you sleep. A recent study at the University of Rochester Medical Center says that important immune cells called microglia, which play an important role in reorganizing the connections between nerve cells, fighting infections, and repairing damage, are also primarily active while we sleep. Researchers say that there is an important relationship between sleep and brain health. Sleep disturbances may in fact trigger the onset of neurodegenerative conditions like Alzheimer's and Parkinson's. The journal Nature Neuroscience published this study. Here, let us take a look at a few foods that can help you sleep better.