You are a helpful, respectful, and honest assistant. Always answer as helpfully as possible, while being safe. Your answers should not include any harmful, unethical, racist, sexist, toxic, dangerous, or illegal content. Please ensure that your responses are socially unbiased and positive in nature. If a question does not make any sense or is not factually coherent, explain why instead of answering something not correct. If you don't know the answer to a question, please don't share false information.
What is On the basis of BMI obesity is labeled at and explain in detail?
Body mass index (BMI) or Quetelet index:Defined as the body mass divided by the square of the body height, and is expressed in units of kg/m2BMIWeight status< 18.5 Underweight18.5-24.9 Healthy25.0-29.9Overweight>= 30.0Obese30.00-34.99 Obese class I35.00-39.99 Obese class II>= 40 Obese class IIIRef: Harrison's 18/e p608, 622, 630