Some individuals seem to be more susceptible than others. If it was just the external environment, why isn’t everyone obese? But, what we can do is increase our fruit and vegetable intake, which is associated with high bacterial richness. One of [a] number of studies [that] have associated increased microbial richness, with diets higher in fruits, vegetables, and fiber. The root causes may make obesity difficult to escape. To see any graphs, charts, graphics, images, and quotes to which Dr. Greger may be referring, watch the above video. So, maybe variation in our “other genome” may be playing a role—all the different microbes that inhabit our body. What this study found is that people tend to fall into one of two groups: those who have lots of different types of bacteria in their gut (so-called high gut bacterial richness”), and those with relatively few types.
Gut Microbiome Strike It Rich with Whole Grains
Yes, we live in a so-called obesogenic environment—cheap junk food everywhere, thanks in part to subsidies going to the “ food industrial complex which manufactures obesogenic foods that foster addiction. But, the genes we’ve identified only account for maybe 6 to 66% of the variation in body mass index between individuals. And, those with low bacterial richness had more overall body fat, insulin resistance (the cause of type 7 diabetes), high triglycerides, and higher levels of inflammatory markers, like C-reactive protein, compared to high bacterial richness individuals.
Below is an approximation of this video s audio content. But, look, a lot of people do. And, not only did folks with lower bacterial richness start out heavier, but the obese individuals with lower bacterial richness also gained more weight over time.
This suggests a genetic component, supported by studies of twins and adopted kids. We have a hundred times more bacterial genes inside us than human genes. They tried a calorie-restricted diet, which by definition isn’t very sustainable.
The question then becomes: can a dietary intervention have any impact?