Here are ways to help approach someone:
let them know of your willingness to help them without judgement
show them that you understand and acknowledge what they might be feeling
research eating disorders to gain an understanding of the issue and look up support services to reach out to
approach them in a quiet place with no disturbances
talk about times you felt worried for them
mention that you understand that the worries about weight and body image are only part of the picture
remind them that you are available for future conversations
Seeing friends struggling with eating disorders can be very hard as you may feel frustrated or confused . Let them know you love them and care for them. Tell them recovery is possible. Admire their energy to recover and talk about how they feel instead of eating habits and food.