A deficiency in a nutrient means that the intakes of this nutrient (or the quantities available after absorption) are not sufficient to satisfy the needs of the organism, without necessarily that there are visible clinical signs. It is a wider term than the word deficiency which is a deficiency severe enough to cause clinical and biological signs.

Energy expenditure

It is the amount of energy essential to the various activities of the organism.

There are several types of spending


On average, the diet is used to talk about a particular diet prescribed by the physician or dietician either restrictive or supplemented. In everyday language, this word is most often used in the sense of "food restriction or lack of food" (being dieters).


Set of principles to balance your diet in order to maintain the best possible state of health.

The aim of therapeutic dietetics (or dietotherapy) is to define the diet that best suits people with a given metabolic disease or disorder and to propose a diet that is appropriate for each particular case. >


A paramedical specialist specializing in nutrition, the dietician works either in a private practice or in a hospital, in a clinic or a health center, or in a group catering environment (school canteens).
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The minimum energy necessary for the functioning and maintenance of the body even when it is completely at rest: heart beats, breathing movements, digestive functions etc. Keeping the body at a stable body temperature close to 37 degrees requires Of energy expenditure, in particular for the fight against the cold, or in the fight against fever in the event of illness: At certain ages or stages of life, the organism is growing: infants, children and adolescents. In pregnant women the development of the fetus and placenta leads to increased energy requirements and other nutritional needs. Similarly during breastfeeding for the production of milk. Muscular work requires an energy supply that varies according to the intensity of the physical activities and their duration. This component is important in the calculation of energy expenditure and can vary from one to two times.