New BMIBeauty by Mrs C - January 21, 2013February 6, 2013Apparently we shorter people are fatter than we thought we were whereas taller people are actually less fat! Oxford academic & mathematician Nick Trefethen believes that the body mass index formula is flawed and so he has come up with a new BMI formula of his own.It's got to be said that I've never really understood how you can compare a muscular 5 foot 8