Sleep and wakefulness are normal rhythmic phenomena prevalent in humans and higher animals, sleep is an essential physiological process to maintain the health of the body and the normal function of the central nervous system. Long-term poor sleep will seriously affect health, nutritionists pointed out that one of the causes of sleep disorders is to drink, some food to assist in sleep, as follows: 1, millet: millet is the richest in tryptophan, people often eat will not only produce a sense of satiety, but also promote the secretion of insulin, improve the number of tryptophan into the human brain, tryptophan is an essential amino acid, is a natural Sleeping pill. 2, oatmeal: oats is a valuable bedtime good, cook a bowl of oats with a little honey mixed food is the best hypnotic food. 3, whole wheat bread: a piece of toast, with tea and honey, can help the body to release a kind of insulin, this insulin can make tryptophan to reach the human brain, and where it is converted into complex amines, thus playing a role in sleeping. 4, warm milk: some studies have shown that there is a tryptophan in milk, which has a calming and tranquilizing effect, while milk is rich in calcium, which can make people feel tired. Drinking a glass of warm milk before bed helps improve the quality of sleep, but be careful not to be too full or too hungry. 5, cinnamon: cinnamon is warm and sweet, has a tonic brain, stomach and spleen, rich in a variety of vitamins and rich glucose, has a high nutritional value, taken in moderation can not only replenish the blood, there is a calming effect of sleep, do not eat a lot. 6, whole wheat food: whole wheat food is rich in vitamins, minerals and fiber, not only has a high nutritional value, to provide energy for the body, and the role of sleep. 7, sunflower seeds: sunflower seeds are rich in vitamins and a variety of amino acids, the inhibitory function of brain cells also have improved, so you can calm and tranquilize. 8, potatoes: a small baked potato not only will not destroy your stomach and intestines, but also can remove those substances that prevent tryptophan from playing a hypnotic role. In summary, certain foods can promote human sleep, but never in moderation. Poor sleep is the end result of a variety of complex factors, including physiological, psychological, environmental and other factors of change, as well as drugs, neuropsychiatric and physical disorders, can not rely solely on food to improve.