Body mass refers to the total weight of a person's body, which is typically measured in kilograms or pounds. It is an important factor in assessing overall health and can be influenced by various elements such as muscle, fat, bone density, and water content. To evaluate body mass, the Body Mass Index (BMI) is often used. This calculation takes a person's weight and height into account to categorize them as underweight, normal weight, overweight, or obese. Understanding body mass can help individuals make informed decisions about their health and lifestyle.