For those of us who have been slim our entire life and can't afford to lose an ounce, the very best way to maintain or gain weight is going to the gym! Pump the iron!!! Working out is paramount for good energy levels to combat fatigue (if you have it), and for mental health maintenance to get through this "bump" in our lives. A bright and positive outlook will go miles in accepting your BE/MAI dx; after all it's not cancer-nor a death sentence-woo hoo!