I am 43 years old, and I have been 15-20 lb.s overweight most of my life. Last summer (6 months ago), I started eating healthy, smaller portions and being more active to lose weight. At the time, I was 205 lb.s. The dieting worked fine and I lost 40 pounds with little effort in 6 months. Now, I am at my ideal weight and I am still losing regardless of what or how much I eat. I have tried eating foods that should pack on the pounds but i'm still losing 1-2 lb.s a day. I am worried.