Energy expenditure The amount of energy measured in calories that a person uses. Calories are used by people to breath circulate blood digest food and be physically active. Hydrogenation A chemical way to turn liquid fat oil into solid fat. This process creates a new fat called trans fatty acids. High-density lipoprotein A form of cholesterol that circulates in the blood. Commonly called “good” cholesterol. Nutrition The process of the body using food to sustain life. Body mass index A measure of body weight relative to height. BMI can be used to determine if people are at a healthy weight overweight or obese. Cholesterol A fat-like substance that is made by the body and is found naturally in animal foods such as meat fish poultry eggs and dairy products. Bioelectrical impedance analysis A way to estimate the amount of body weight that is fat and nonfat. Nonfat weight comes from bone muscle body water organs and other body tissues. BIA works by measuring how difficult it is for a harmless electrical current to move through the body. Pancreas A gland that makes enzymes that help the body break down and use nutrients in food. Carbohydrate A major source of energy in the diet. There are two kinds of carbohydrates simple carbohydrates and complex carbohydrates. Metabolism All of the processes that occur in the body that turn the food you eat into energy your body can use.