Food
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.
Five important points why food is important to health
1. Food is our ally on health. From it our body uses the nutrients needed for immune system, growth, and other metabolic functions. Therefore all food provided to us by nature is good and can be consumed in moderate amounts. Meanwhile more varied our diet, the more complete the offer of protective elements we give to our body.
2. A food is valuable only “if he is rich and has few calories.” Today, with the study of functional foods, nutrition teaches us to choose foods that contain in themselves are natural elements of disease prevention. So yes the nuts, whole grains, avocados, vegetables and fruits of all kinds, red and white lean meats, vegetables … Remember that the amount that marks the boundary between the same food “fattening or not.”
3. The decrease in salt and sugar are in no way advice only for diabetics and hypertensives. The entire population, including children, should control the amount of them. We’re not talking totally suppress, rather moderate.
4. Prefer fresh food and little manufacturing, those highly processed food industry which has been making its aggregates.
5. Recall that distribute food within 4 to 6 meals a day is ideal for proper digestion and metabolism. None of these foods should leave us with “stomach fullness,” so the portion size is critical.