A good food is the food that fulfills several requirements which are hygine, containing balanced nutrition, and easy to digest.
The general functions of food for human are as follows.
a. Source of energy, coming from carbohydrate, lipid, and protein.
b. Body builder and replacement of damage cells.
c. Controlling the internal process of body, such as nerve coordination. The source is obtained from mineral, vitamin, and protein.
d. Immunization of the body, obtained from food containing prebiotic (reprsented) by fiber i.e lactose) and probiotic (represented by floral bacteria)
Nutrients can be grouped based on the amount required by body which are macro nutrients and micro nutrients.
a. Macro nutrients are the nutrients required by body in a large amount, including carbohydrate, lipid, protein, and water.
b. Micro nutrient are the nutrients required by body in a small amount, including vitamin and mineral.
Carbohydrate is an organic compound which become the main source of energy for human and animal. Carbohydrate is composed of carbon (C), hydrogen (H), and oxygen (O), The general molecular formula of carbohydrate is CnH2nOn.
Carbohydrate is also composed of simple compounds (simple carbohydrate), such as monosaccharide, or complex compounds (complex carbohydrate) such as polysaccharide and fiber.
Carbohydrate can be distinguished into three groups based on the number of sugar group composition, namely monosaccharide, disaccharide, and polysaccharide
Carbohydrate has several function, as the main source of energy for body, controlling lipid metabolism, maintaining acidity and alkalinity balance, forming the structure of cell, tissue , and organ, assisting calsium absorption (conducted by lactose), giving sweet taste on food, and assisting in feces excretion. We can get carbohydrate from the food made of grains (cereal), tuberous rood,dry nuts, and sugar.