A few months ago my best friend found out she was underweight. She has always been small with a small appetite and she just laughed it off.
Recently she joined the gym and I heard her make a comment about how she 'felt fat in what she was wearing'. I have struggled and still am struggling with my own self image but I don't know how to approach this topic with her. I'm worried she sees herself differently that she is and that it might effect her health. I don't have much knowledge of eating disorders so I'm asking people with experience in a situation like this for help.
How should I approach her without offending her??