Nutrition need
Nutrition is a scientific discipline that studies and analyzes the processes by which our body uses, transforms and incorporates in its structure a series of chemicals defined as part of the food. The modern concept of nutrition was established by Lavoisier in the mid-eighteenth century. Showed that feeding responded to an energy problem. Without food an organism dies like a car without gasoline. But in addition, provide the necessary energy, food must provide us with certain chemicals, called nutrients. These are released from food during digestion.
Carbohydrates, proteins and fats – the macronutrient-supplying the main building materials for cell growth. They are also the only source of calories or energy for the body. Each gram of carbohydrate or protein provides about 4 calories. Each gram of fat around 9. Micronutrients are vitamins and minerals do not provide energy consumed in small quantities. But they are less important from a nutritional standpoint. Vitamins and minerals help build and maintain macro-organism.
Every day, we need about 50 components of these nutrients in certain proportions. These nutrients are responsible for providing our body with the necessary materials for construction, maintenance, renovation and repair of the human body so as to regulate the many chemical reactions that occur therein.
The answer to why you should eat everything is clear. There is no complete food in itself, except breast milk. A varied diet ensures that our bodies will reach these different nutrients. In addition, we must become aware of in the right amount, or more or less.