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Why can milk promote sleep?
Milk contains tryptophan and melatonin to promote sleep.

According to the Daily Mail of 65438+February 16, a recent study by Sahmyook University in Seoul, South Korea shows that milk milked at night contains more tryptophan and melatonin. These chemicals can help people reduce anxiety and promote sleep. There is a scientific basis for the sentence "Drinking a glass of warm milk before going to bed can get a good sleep".

Milk contains two hypnotic substances:

One is tryptophan, which can promote brain nerve cells to secrete the sleepy neurotransmitter serotonin;

The other is peptides that can regulate physiological functions. Among them, "opioid peptide" can combine with the central nervous system, play an anesthetic and analgesic role similar to opium, make people feel comfortable all over, and help relieve fatigue and fall asleep.

Not suitable for drinking milk to help sleep;

1, kidney calculi patient. The most dangerous factor of stone formation is the sudden increase of calcium concentration in urine in a short time. Drinking milk for 2-3 hours before going to bed is the peak of calcium excretion in milk through the kidneys. At this time, it is in a state of sleep, urine is concentrated, and calcium passes through the kidney more, which is prone to stones.

2. People who lack lactase in their bodies. Everyone knows that this problem is also called lactose intolerance. The content of lactose in milk is very high, and lactose cannot be directly absorbed by human body. It must be hydrolyzed into galactose and glucose under the action of lactase in digestive tract to be absorbed. Without lactase, lactose cannot be absorbed.

3. People with certain digestive diseases. In the past, people thought that milk was the best food for patients with digestive tract. Recent research shows that milk can promote gastric acid secretion more than ordinary food, thus aggravating and inducing digestive tract diseases. Therefore, people with digestive tract diseases such as gastric and duodenal ulcer, ulcerative colitis and cholecystitis had better not drink milk.

4. Abdominal surgery. This kind of person will flatulence when drinking milk, which is not conducive to postoperative rehabilitation.

5. People who take iron drugs. When you are taking iron drugs to treat iron deficiency anemia, if you drink calcium and phosphorus in milk, it will combine with iron drugs and affect the curative effect.

References:

People's Daily Online-Research: Milk produced by cows at night is more conducive to sleep.

References:

People's Daily Online-Milk can help people sleep 10 People should not drink milk before going to bed.