It is generally believed that drinking pure milk before bed helps you sleep and replenish your body with calcium and protein, but there are certain disadvantages, not everyone is suitable for drinking milk before bed, such as allergy groups, indigestion groups, etc. 1, benefits: milk contains L-tryptophan, L-tryptophan can promote the body to secrete 5-hydroxytryptamine and melatonin, thus regulating sleep, but the total amount of L-tryptophan in a glass of milk is very small, and the effect is very limited. The effect is very limited. Some scholars believe that the effect of milk on sleep may be influenced by the temperature of the milk and psychological factors. Drinking warm pure milk can soothe the body and make people feel relaxed and comfortable, thus making it easier to fall asleep. Drinking milk before bedtime can also provide protein and calcium, which can enhance the body’s immunity and have some benefits for the prevention of osteoporosis, of course, drinking milk during the day can achieve the same effect; 2. Bad: If the amount of milk consumed is too much, it may increase the feeling of fullness in the stomach as well as the number of urination at night, which in turn affects deep sleep. Some pure milk is too high in fat, which may lead to weight gain and elevated blood lipids. The body’s saliva production decreases after sleep, and milk residues in the mouth can promote the growth and reproduction of bacteria, which can erode the teeth and cause a series of oral problems. In addition, after abdominal surgery and patients with urinary stones are not suitable to drink milk before bedtime, which may cause uncomfortable reactions or aggravate the condition. If you are allergic to milk and people with indigestion, you should not drink milk at night, as it can cause allergic reactions or make indigestion worse.