The old adage of “you are what you eat” is actually only partially true. Yes, the quality of nutrition and calories that you consume are important factors of overall health. But how much of that nutrition your body is able to assimilate and incorporate into its muscles, neurons, and tissues is just as vital. And all that depends on your digestive system.The old adage of “you are what you eat” is actually only partially true. Yes, the quality of nutrition and calories that you consume are important factors of overall health. But how much of that nutrition your body is able to assimilate and incorporate into its muscles, neurons, and tissues is just as vital. And all that depends on your digestive system.