What are the calories? That whom we fear so much? The ones that make us gain weight and make us strictly count the food portions?Actually calories are unit of energy. It is an amount of energy that raises the temperature of 1 gram of water by 1 Celsius degree.

     Calories are not just something to cut of from the daily portion of food, because calories are used by the human body for well functioning of the organism. When heart beats, air is pumping in to the lungs or digestion starts, calories are being used. This is the basal metabolic rate, also called BMR, the minimum calories the human body needs to well-function. Therefore, some quantity of calories is needed to be eaten for the minimal well function of the normal physiological human body processes.

     Calories are found not only in food. Gasoline has also calories. By burning them, the car has enough energy to run for several miles. All food groups contain calories. Also drinks have calories. Beer, juice, soda all have calories, except tab water.

     A gram of carbohydrates has 4 calories; one gram of fat has 9 calories, one gram of alcohol has 7 calories and a gram of protein 4 calories. The carbohydrates are the preferred energy source of the organism.Although one calorie of fat is same like one calorie of carbohydrate or protein, the difference between them consist in the fact that one gram of fat brings more calorie to the body that one calorie of carbohydrate or protein.

     The consummation of fat beside the great intake of calorie also is harder to be decomposed and has non benefic effects on the cholesterol level. The proteins are preferred because they are quickly decomposed and used by the human body when great effort is done.

     Carbohydrates are the preferred source of energy to the body, because of the quickly way to decomposing to simple sugar and they are immediately used by the blood, and are transported to the cells. Reduction of the sugar level from the blood, a state called hypoglycemia, causes dizzies, head aches or weakness.

     Increasing the consummation of sweets, rich in carbohydrate, can lead in time to diabetes. The quantities of calories listed on the food package in supermarkets are majority labeled in kilocalories. One kilocalorie has 1000 calories.

     Losing weight by doing physical exercises is also counted in kilocalories. Knowing this, a person can control the calories ingested, because the majority of the aliments are a combination of the essential group food.

     After digestion the enzyme of the organism are breaking the carbohydrate into glucose and other sugar, the proteins into amino acids and the fats into glycerol and fatty acids, the wholly process being called metabolism. These macronutrients are after that decomposed in micronutrients, transported to the cells and there redirected to the blood and cells and give energy to the body. The calories that are not consumed are transported to the fat tissue and causes weight gain. By consuming more calories that are needed by the organism lead to gain weight and fewer calories ingested lead to losing weight.

     Consuming fewer calories than is necessary for the essential process of the human body can lead to malnutrition, and excess of calories leads to obesity.There are many diets and physical exercises that can help you lose weight. The most effective diet is one based on high-fiber and low fat

     The diets that interdict carbohydrates consummations deprive the human body from an important source of energy, the most effective one.

     Physical exercises, at least half an hour per day, are necessary to lose weight and stay in good health.A good health and no weight problems can be achieved by consuming calories, because are very useful, if they are eaten rationally and no making excesses.