Bacteroidetes are, in many parts of the world, the most widespread intestinal bacteria, but this is not the case in our latitudes, where Firmicutes dominate. Unlike Firmicutes, these bacteria do not assimilate lipids well.
Certainly, in the event of lack of food, people with fewer Bacteroidetes and more Firmicutes, which are able to assimilate lipids, do better. However, the environment in which we live today presents us with fewer challenges and people in the Western world live more in food abundance.
Europeans and North Americans generally have fewer Bacteroidetes in their intestine. It is interesting to ask whether this has a genetic origin, which would mean that we couldn't change this. However, studies have shown that the gut bacterial ratios of African-Americans are closer to those of other North Americans than to those of native African populations. Fortunately, this means that we can multiply our Bacteroidetes by changing our lifestyle and eating habits.
Furthermore, it appears that the diversity of our food bacteria also has an impact on our weight. Thus, people with a high diversity of bacteria have fewer problems with being overweight. Indeed, the more varied the bacteria, the more diversified their functions are and the more efficient our metabolism is.
What are bacteroidetes and how they multiply?