What you can do to help a friend

Between 2000 and 2008, the Hong Kong Eating Disorders Association identified 1,170 cases of eating disorders from more than 2,300 inquiries on its hotline. Of those, more than half were cases of bulimia; about 30 per cent were anorexia and almost 10 per cent involved eating disorders not otherwise specified. More than half of the sufferers were aged between 16 and 25.

Unspecified eating disorders have been on the rise, accounting for 39 per cent of cases identified in 2008, with bulimia making up about 33 per cent and anorexia about 27 per cent.

Here are some signs shown by people who may be suffering from an eating disorder:

1 Marked or continuous weight loss

2 Absence of menstruation

3 Restrictive diet and rigid/unusual eating rituals