Overweight Refers to an excess of body weight compared to set standards. The excess weight may come from muscle bone fat and/or body water. Low-density lipoprotein A form of cholesterol that circulates in the blood. Commonly called “bad” cholesterol. Polyunsaturated fat A highly unsaturated fat that is liquid at room temperature. Lipoprotein Compounds of protein that carry fats and fat-like substances such as cholesterol in the blood. Gestational diabetes A type of diabetes mellitus that can occur when a woman is pregnant. Metabolism All of the processes that occur in the body that turn the food you eat into energy your body can use. Calorie A unit of energy in food. Foods have carbohydrates proteins and fats. Trans fatty acids: A fat that is produced when liquid fat oil is turned into solid fat through a chemical process called hydrogenation Weight control: Achieving and maintaining a healthy weight by eating well and getting regular physical activity. 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.