BMI between 18 - 20With a BMI between 18 - 20 you are skinny, while a BMI between 18 and 18.5 even is already classified as sleight underweight. Being skinny does not necessarily mean that you are unhealthy. Do you eat a lot but still don't gain weight? In that case we advise you to make an appointment with your family doctor to have investigated if there are any causes for your small BMI that should be treated. |