How are macronutrients stored in the body?

The three macronutrients of the human are carbohydrates, proteins and fats. FAT: stored as adipose tissue and a small amount is stored in the muscle.

PROTEIN: used as the building material of muscles and organ tissue - no "storage" per se.

CARBS: stored as glycogen in the muscles and liver. Glycogen storage is limited and can only provide 1600 - 2000 calories when needed.