It was only when I reached back to my academic roots in medical biochemistry and decided that a ketogenic nutritional program and lifestyle was the physiological way to reach optimal body weight and composition that I finally got to my target weight with BMI ( Body Mass Index) at the low end of the normal range. 

One of several tools that I use to keep me on track is the wireless Fitbit Aria Scale. This scale uses BIA (Bioelectrical impedance analysis) to measure % body fat. Each morning I step on the scale  and my weight, %fat and calculated BMI is sent to my FitBit app.