Fruits that help sleep include apples, kiwifruit, bananas, grapes, pineapples and longan. Potassium in apples can relieve nervous tension; magnesium in kiwifruit and banana can inhibit nerve sensitivity; melatonin in grapes can whiten and relieve fatigue; vitamin K in pineapple can calm nerves; longan can nourish Qi and calm nerves and promote sleep.