Joanna Fortune: Picky teenage eaters and the questions around weight loss

"You describe her as always having been a 'picky eater'. I wonder if there has always been an emotional charge around food in your relationship as a result of this."

Dr Joanna Fortune: "Try reflecting in a positive way: 'I noticed how committed you are about your running, well done, I am proud of you for making that commitment to your goals'."

My 15-year-old daughter has always been a picky eater. A few months ago, she started running and has lost weight as a result. I've suggested that she eat more to regain the weight, but she says she doesn't want my advice as I'm not qualified in nutrition. When I suggested seeing a dietitian, she immediately shut down the idea. I'm afraid she could develop an eating disorder.

I suggest that you try not to project too far ahead into what this 'could' become and try to stay-in-the-now with her and what you know to be happening right now. Your daughter is making a change to how she moves and fuels her body. She has increased her level of physical activity but has not increased her calorie/nutritional intake to support that increase in exercise and this is resulting in notable weight loss. What I am not clear on from your letter, and you may not be clear yourself, is if weight loss is her primary goal or a secondary outcome.