What is the best way to support people with bulimia?

Stages of change: It depends on where they are in thinking about his as a problem. Some people are ready to make a change and for them supporting them as they do so is perfect. Other people are not even really thinking that they have a problem (pre-contemplation stage) and for them if you approach the problem as one that you just need to help them deal with they will think you are crazy.

Educate yourself: Educate yourself about bulimia; it's a way of coping with emotions and conflicts with food. Bring up your concerns, ie, "I notice that you're struggling with food. Tell me how I can help." If the person denies or minimizes the behavior, offer support and strongly encourage the person to seek treatment. Providing compassion and understanding (and not talking about appearance) can help.