In recent years , the health of the bacterial flora has become one of the most debated topics in the field of correct nutrition : following interesting and recent discoveries, in fact, the experts have been able to affirm with certainty that not only the bacterial flora of a person with overweight problems tends to be less differentiated, and therefore poorer, than a naturally thin person, but that if the intestinal flora of a thin person were implanted in an overweight person, he would lose weight. Still, other studies have hypothesized the correlation between bacterial flora and metabolism, and between bacterial flora and the immune system, going so far as to argue that improving our microbiota, or our intestinal bacterial system,is the key to staying fit and in perfect health.

But how to do it? While the experts develop new generation probiotics that do not yet exist on the market, the average reader learns that there are probiotic and prebiotic foods: the former literally nourish the good bacterial flora, stimulating the production and growth of bacteria through the action of enzymes, that is, they are living organisms and agents; the others create a healthy environment for life and the development of good bacteria, that is, they are foods useful for intestinal health and regularity, for example fibers.