Hi, I m 16 and eat healthily- too healthily, according to my family. My bmi , as taken by a doctor, is 20.8, which according to her, is more towards the underweight side of healthy? BUT, I ve been eating a little more as she doesn t want me to lose any more weight, and I ve suddenly gotten slimmer in my waist and on my face , and I keep feeling hungry. My mum reckons this is because I m growing. What do you think? By the way, I walk quite a lot and am usually fairly active.