600 calories is equivalent to about 67 grams of fat. Because 1 g fat can provide about 9 calories, 600 divided by 9 is about 67 grams of fat, but the human body needs to eat it every day, so it consumes much less fat than it actually does.
Fat, which means the substance that stores energy in organisms, has the functions of protecting and supporting animals, reducing body heat loss and keeping body temperature constant.