Insulin A hormone in the body that helps move glucose sugar from the blood to muscles and other tissues. 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. Overweight Being too heavy for one’s height. It is defined as a body mass index BMI of 25 up to 30 kg/m2. Trans fatty acids: A fat that is produced when liquid fat oil is turned into solid fat through a chemical process called hydrogenation Pancreas A gland that makes enzymes that help the body break down and use nutrients in food. Bariatric surgery Surgery on the stomach and/or intestines to help the patient with extreme obesity lose weight. Bariatric surgery is a weight-loss method used for people who have a body mass index BMI above 40. Registered Dietitian A health professional who is a food and nutrition expert. Very-low calorie diet: A person following a VLCD eats or drinks a commercially prepared formula that has 800 calories or less instead of eating food. High-density lipoprotein A form of cholesterol that circulates in the blood. Commonly called “good” cholesterol. Polyunsaturated fat A highly unsaturated fat that is liquid at room temperature.