People with anorexia are more likely to wake up early in the morning.
Anorexia suffers wake up earlier in the morning
New data shows that those with the eating disorder and mental health condition are more prone to being early risers and also experience insomnia.
The new study analysed genetic data from over 70,000 people and found a two-way association between genes associated with anorexia and those associated with the morning chronotype - waking up early and going to bed early.
It is the first time a link has been discovered between mornings and anorexia, although previous findings have found a connection to the body's circadian rhythm.
The scientists have called for more powerful studies to be conducted to find out further information on the issue.
Hassan Dashti, from Massachusetts General Hospital (MGH), said: "Our findings implicate anorexia nervosa as a morning disorder in contrast to most other evening-based psychiatric disorders and support the association between anorexia nervosa and insomnia as seen in earlier studies."