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. Obesity Refers specifically to having an abnormally high proportion of body fat.[1] A person can be overweight without being obese as in the example of a bodybuilder or other athlete who has a lot of muscle. However many people who are overweight are also obese. Overweight Being too heavy for one’s height. It is defined as a body mass index BMI of 25 up to 30 kg/m2. High blood pressure Another word for “hypertension.” Blood pressure rises and falls throughout the day. An optimal blood pressure is less than 120/80 mmHg. Type 1 diabetes: Previously known as “insulin-dependent diabetes mellitus” IDDM or “juvenile diabetes.” Type 1 diabetes is a life-long condition in which the pancreas stops making insulin. Diabetes Mellitus A disease that occurs when the body is not able to use blood glucose sugar. Blood sugar levels are controlled by insulin a hormone in the body that helps move glucose sugar from the blood to muscles and other tissues. Calorie A unit of energy in food. Foods have carbohydrates proteins and fats. 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. 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. 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.