Just got back from doctor and he wanted to give me a general check over as well as what I was there for (yay sinus infection) and according to the charts my BMI is 20 and marks me as underweight, HOWEVER I'm 5' 9" and doc conceded my height to weight ratio (63.5kg) played a part in my low BMI. My main issue is loss of muscle mass I need to rebuild, NOT fat. Fat will just make my fibro (cause of muscle mass/weight loss) worse.