Milk

Milk
Nowadays,more and more people want to have healthy body. Because they have begun to focus on the quality of life.So healthy diet is important for us. Milk is one of important things in our lives.
The chemical compositon of milk is very complex. It has more than 100 kinds of composition at least.The main components are water ,fat ,phospholipid, protein, lactose, salt, etc. In generally, the concentration of main chemical components of milk are:
Moisture: 87.5%
Fat: 3.5%
Protein: 3.4%
Lactose: 4.6%
Salt: 0.7%

There are 22 kinds of protein amino acid composition of the human body.There are 9 kinds of which can not synthesis of the human body itself.These amino acids known as essential amino acids.We eat protein if it contains all the essential amino acids.This protein will be called the all-protein. The protein of milk is all-protein.Inorganic salt of milk,also known as minerals.
The cation of milk containing Ca2 +, Mg2 +, K +, Fe3 + and anion containing PO43-、SO42-、Cl- and so on. in addition to there are few of melements I, Cu, Zn, Mn, etc.
The vast majority of these elements plays an important role in regulating metabolism on human growth and development. Calcium is the highest inorganic salt in the body,
is the main component of constitutes Bones and teeth. 90% of calcium depend on the teeth and bones of the body.Children and teenagers need adequate calcium for their growth and development.
The same pregnant as women ,adults,and the elderly also need to add calcium. Lack of calcium will affect the normal development of the teeth and bones and lead to rickets. Nature of the calcium existence of state is based on the compound. Milk contains abundant active calcium and is man's best source of calcium.
As we know, milk is good for our healthy, but it also has some harm for our body. For example,many studies show that the men who often drunk milk susceptible to prostate cancer. If we use wrong methods to drink milk ,it also takes some harms. E.g. don’t mix suger when milk boiling. Don’t drunk cold milk in summer.
On an empty stomach should not drink milk. The bottle of milk can not under the sun. Although milk has some disadvantage for our body but its advantage more than it. For example, before you go to bed you should drink a glass of hot milk, it can governance neurasthenia and insomnia. And milk contains a lots of B2, Can promote skin metabolism and so on.
There are six functions of milk
1. It is nutrient-rich
2. It can restrain tumor
3. It can calm and soothe the nerves
4. It can takes our skin smooth
5. It can helps girls lose weight
6. It can promote brain development for the infant.
Maybe form these imformations,you can know more about milk and there are lots of affect for milk. Expired milk can be used to shoeshine. So the advantage of milk is more than disvantage.
Overall milk is good for our healthy.

Reference
http://baike.baidu.com/view/4964.htm