Let’s start with the small minority who absolutely should not adopt the BioDiet. The following list of contraindications is a modified version of one that first appeared in the journal Epilepsia in 2009 by Dr. Eric Kossoff of Johns Hopkins University, an authority on the therapeutic use of ketogenic diets.

Optimal clinical management of children receiving the ketogenic diet: recommendations of the International Ketogenic Diet Study Group.

BMI, which was devised by Belgian mathematician Adolphe Quetelet in the mid-1800s, estimates our body composition; that is, the amount of fat we’re carrying compared to our lean body mass.

Adolphe Quetelet (1796–1874)—the average man and indices of obesity

According to the weight classification categories established by the World Health Organization, a BMI of 28.3 means you are considered overweight.

Body mass index – BMI

A simple and more accurate way to determine body fat is to use a formula recently devised by Orison Woolcott and Richard Bergman at Cedars-Sinai Medical Center. Rather than estimate relative body mass, this calculation approximates relative fat mass, or RFM.

Relative fat mass (RFM) as a new estimator of whole-body fat percentage ─ A cross-sectional study in American adult individuals