Actually according to studies BMI underestimates body fat. And by a substantial margin too. About 40% of people classes as not obese by BMI are actually obese.

Actually according to studies BMI underestimates body fat. And by a substantial margin too. About 40% of people classes as not obese by BMI are actually obese. Very few in the other direction; this study doesn't mention them >Mean BMI was 27.3 (SD = 5.9) and mean percent body fat was 31.3% (SD = 9.3). BMI characterized 26% of the subjects as obese, while DXA indicated that 64% of them were obese. 39% of the subjects were classified as non-obese by BMI, but were found to be obese by DXA. BMI misclassified 25% men and 48% women. Meanwhile, a strong relationship was demonstrated between increased leptin and increased body fat. https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0033308 https://journals.plos.org/plosone/article?id=10.1371/journal...