Most people know that the three primary macronutrients are carbohydrates, fat, and protein. When asked which of the three is most commonly consumed grossly over the recommended amount in the typical American diet, the vast majority of people will answer either carbs or fat.  I am not surprised by this, as Americans have been bombarded with marketing demonizing both carbs and fat for several decades. In reality, the most commonly over consumed macronutrient in America is protein. Americans are protein obsessed. Given that our protein consumption is so high, it is helpful to know how our bodies process protein, what happens to the excess protein we eat, and the resulting consequences.