The WHO (World Health Organization) defines it as "a state of complete physical, mental and social well-being and not a simple absence of illness".

We can act on health mostly by preventing. Therefore, always the WHO, establishes three distinct levels of prevention:

1. PRIMARY: it is exercised on the healthy individual. It provides for the enhancement of factors useful to health and the removal or correction of the causal factors of diseases, avoiding the onset of morbid conditions. Currently the factors most closely monitored to detect a person's state of health are:

NUTRITION

PHYSICAL ACTIVITY (performed regularly, gentle and not excessive)

ALCOHOL CONSUMPTION (toxic substance for liver, stomach and nervous system)

CIGARETTE SMOK

2. SECONDARY: it intervenes on subjects already ill, at an early stage or with a genetic predisposition to develop a certain pathology (eg, breast cancer familiarity). It represents a second-level intervention which, through the early diagnosis of diseases, aims to achieve healing or at least limit its progression.

3. TERTIARY: refers to all the actions aimed at controlling and containing an already established disease. It consists in the accurate clinical-therapeutic control of chronic or irreversible diseases, and aims to avoid or limit the occurrence of both late complications and debilitating outcomes.

In light of the above, it can be deduced that each individual is called to work personally on his own health, starting from one of the levels described above depending on the situation in which he findshimself. The lowest common denominator of all three levels is represented by the lifestyle, which influences and determines: health, way of thinking and being. Lifestyle means habits: food, behavior and hygiene that are taken every day. Observing the statistical data, it can be seen that nowadays, a state of good health is not the preserve of many. So much so that in the industrialized countries the "DISEASES OF WELLBEING", that is diseases caused by overeating and by incorrect feeding, represent one of the main causes of death. These include cancer, the first cause of death in the US and second in Europe, cardiovascular diseases, diabetes mellitus, obesity etc. Epidemiological data are disarming: it is estimated that 47% of the American population has the possibility of getting cancer, while 1/3 of adults aged> 20 is obese.The cases of Diabetes Mellitus have increased by 70% in less than 10 years and with it the cases of heart disease and stroke.

In recent years, both scientists from around the world and international research groups have revived the possibility of treatment through a review of nutrition and lifestyle.

These last two factors are seen as a panacea for many ills, capable of acting on all three levels of prevention. Therefore, useful and up-to-date information will be provided periodically from a scientific point of view on nutrition and hygienic behavioral rules that can promote good health.