Olestra Trans fat. NSW Health. Glycosylation N-linked O-linked. Protein synthesis Catabolism. MVA pathway. Bile acids. Calciferols vitamin D. The nutrition facts as they are also called usually include how many calories are in the food, how much carbohydrates, fat and proteins are present as well as the Calories per gram of each type of energy source. Main articles: Bioenergetics and Energy balance biology.
How much energy does a snack food contain? Food that we eat gives us energy to go through our day. It gives us energy by providing energy to the cells inside our body. Carbohydrates in food are used first. When they are all used up, the body then uses fats, and then proteins as energy sources. So carbohydrates, fats and proteins provide energy to our bodies through the foods that we eat. The energy in the food that we it is measured in units of kilocalories or Calories. The Calorie Cal, with an uppercase C used to measure the nutrition in food is actually calories cal with a lowercase c or 1 kilocalorie kcal. While the Calorie unit is used widely in the U.
Food energy is chemical energy that animals including humans derive from food through the process of cellular respiration. Cellular respiration may either involve the chemical reaction of food molecules with molecular oxygen  aerobic respiration or the process of reorganizing the food molecules without additional oxygen anaerobic respiration. Humans and other animals need a minimum intake of food energy to sustain their metabolism and to drive their muscles. Foods are composed chiefly of carbohydrates, fats, proteins, water, vitamins, and minerals. Carbohydrates, fats, proteins, and water represent virtually all the weight of food, with vitamins and minerals making up only a small percentage of the weight.