There are several ways to prevent eating disorders. Generally, it's best to approach it indirectly , avoiding materials like documentaries, films, or articles that directly address eating disorders.
The legal guardians of the affected minor are responsible for requesting medical help. Sometimes, families resist and do not react as we expect or believe the situation requires.
It is recommended to talk to the person about what is troubling them and calmly communicate any changes that have caused concern, without judgment, offering them a confidential space.