As you know, studies on the causes of obesity in recent years have focused on the role of our bacterial flora in weight gain and the body’s tendency to burn more or less calories. I’ve written some in-depth articles, including this one , but I’ll summarize previous studies in a few places:
– gut flora changes from person to person, and affects both our immune system and metabolism
– everyone thinks it’s a matter of good bacteria or bad: it’s actually more complicated than that. The difference between the intestinal flora of a thin person and that of a fat person is the bacterial differentiation: the thin one will have more strains, the fat less.
This means that even if the fat person feeds his “good bacteria” he will always have fewer families than those who are thin. For example, the lean will have ten families of good bacteria (hypothetical number). The fat you are. The four families missing in the bacterial flora of the fat person cannot be born in any way, not even to eat kefir four times a day.

– therefore one of the causes of overweight is a poor bacterial flora, not only of a few good bacteria, but of bacterial families. So much so that experts hypothesize the transplantation of bacterial flora from a thin person to a fat person to give the latter the strains of the families he does not own.
Okay, I’ve summarized the previous news linking our gut health to being overweight.
Of course the researchers have moved on, and what they have discovered, although for now they are experiments on fruit flies, sheds further disturbing light on the powers of our bacterial flora.
In fact, it seems that it is capable of modulating not only our sense of hunger, therefore pushing us to eat too much, but redirecting us to a food or another food depending on the families of bacteria that populate it. So if we are hungry for sweets or too fatty foods , the fault lies with our bacterial flora, that is, how it is composed. Here you can read the new study (in English).
How to act? Is it still worthwhile to follow a diet that feeds the good bacteria to lose weight?
Yes, it is still worth doing: always better to have more good bacteria than bad, even if we have the misfortune of having fewer strains than a person with a fast metabolism. Read the gut diet to find out more.