There is nothing wrong or dangerous about having a low body mass. The opposite is deadly.

It has been proven over and over again that being overweight causes many diseases and even death but being underweight causes none of those. I hate being told to gain weight and you should too. Being overweight can be very very harmful to you in so many ways. YOU DON"T NEED TO GAIN WEIGHT TO BE HEALTHY. Losing weight is always recommended and it ALWAYS restores your health. For all my guys and girls under 96 lbs, its time to own it!