<qa>  What is the BMI between 25 and 40 kgm2?2. Body mass index BMI between 25 and 40 kgm2. Based upon the Evidence Report National Heart, Lung, and Blood Institute NHLBI, 1998, weight loss is recommended for individuals with a BMI 25. However, individuals with a BMI of 40 have more medical co-morbidities and require greater medical supervision. 