With more research, this device could theoretically be used to diagnose, treat, and monitor improvement in people with gut disorders. But the device could also be taken one step further, helping doctors to provide patients with tailored, individualized diets. Choosing foods based on your personal genetic and gut microbial makeup is all the rage in nutrition research lately. But Kalantar-zadeh says individualized diets could have a significant impact on our health. Nutritional facts on food packages still fail to capture the impact of food on each individual. For example, he says, one person may absorb twice as much sugar from the same can of soda as another individual. Someone with more diverse gut microbes might be better able to digest food in the colon, thereby gaining more energy and nutrition from the same meal.