Nope. The chemicals influences the microbes in your gut. Your gut microbes are responsible for a lot of the food pre-processing. What exactly microbes contribute is not always clear but they contribute significantly. Likely they contribute to the break-down of long chained carbohydrates. Disturbing the microbes in the gut is at least a possible mechanism for causing diabetes. There have been other studies that showed significant impact of fecal transplants on body weight.
Generally it is so that correlation is not causation. In this case they backed up their statistics with investigations along the whole digestion tract so it is not so easy to dismiss the idea.
Generally it is so that correlation is not causation. In this case they backed up their statistics with investigations along the whole digestion tract so it is not so easy to dismiss the idea.