Hello there and thank you for your question!
I encourage you to have an open discussion with your daughter and learn more about her food aversions. This may help you (and her) build a better understanding of her eating behaviors and relationship to food and her body.
If you have concerns about your daughter’s weight, I encourage you to ask her doctor for a referral to see a registered dietitian. A registered dietitian can work with your daughter more closely to address the underlying causes of her food aversions and make sure she is getting the adequate nutrition.
During adolescence, your daughter is going through many changes, not only physically, but also mentally and socially. In the meantime, try to make mealtime a relaxed and comfortable experience for her. It's worth it to make mealtime a family time. Hang in there and remember that picky children and teenagers are normal.
Hope this helps and wishing you and your family good health!
Anna Ng, RD