What are the benefits and effects of milk?

Milk can replenish calcium and protein in the human body, and it also has the effect of improving sleep. Here are some detailed benefits:

1. Calcium Supplementation Milk is rich in bioavailable calcium, and the lactose contained in milk helps accelerate the absorption of calcium by the intestinal wall. It is beneficial for the development of bones and teeth, promotes bone calcification, and prevents osteoporosis.
2. Protein Supplementation Milk is nutritious, containing fat, protein, carbohydrates, and vitamins. It also contains pantothenic acid, inositol, and orotic acid. The protein in cow's milk is mainly phosphoprotein-casein, with albumin and globulin also present. These three proteins contain all the essential amino acids. The fat in milk is mainly glycerides of palmitic acid and stearic acid, with a small amount of cholesterol.
3. Improving Sleep Drinking milk before bedtime can help improve sleep quality. Milk contains tryptophan, which aids in the synthesis of serotonin. After being absorbed by the body, serotonin can synthesize the neurotransmitter 5-hydroxytryptamine, making one feel calm and happy. Additionally, the cholesterol content in milk fat is lower than that in meat and eggs. It can also help delay the functional deterioration of bones and teeth in the elderly, making it a highly suitable nutritious food for them. However, milk should not be consumed excessively, especially for those with lactose intolerance, as it can lead to lactose intolerance symptoms such as bloating, abdominal pain, abdominal rumbling, and even diarrhea to varying degrees.