One day, everyone will eat 3 meal. And eat different food. The food contains ingredients such as yards salt used for cooking and salty. Salt is also useful many. Used as a preservative in salted fish, salted pickles. The preservation of fresh leather before tanning Chemical substances for certain species, such as sodium carbonate, commonly known as caustic soda, washing soda (sodium hydroxide), hydrochloric acid gas, chlorine bleaching powder, etc. Sugar is sweet, and provide energy to the body, helping to make the blood circulation