The correct question is:
What is protein?
What is fat?
What is water?
is in every cell in your body. All your body processes, such as digestion, use water. About 60% of your body's weight is water.
makes up about 15% of your body's weight. Your muscles, skin, hair and body organs contain large amounts of protein.
The amount of body
varies with each individual. The average range for a healthy person is anywhere from 5% to 25%.