How do macronutrients, micronutrients and additives get absorbed into our bodies? once they are absorbed, where do they go?

Carbohydrates, one of the four major macronutrients, provide a significant amount of fuel to the human body. However, if carbohydrates are not properly digested and absorbed, they cannot perform their essential functions. Digestion and absorption occurs along the gastrointestinal tract, and remaining, undigested carbohydrates are then eliminated from the colon.