Published Friday, 24 January 2014
Mr Justice Nicholas Kearns says it's a matter of life or death. (© UTV)
The decision has been made by the High Court in Dublin.
The court heard on Thursday that the 22-year-old, who weighs five stone, does not accept she will die if she refuses further nutrition.
It was also revealed that the woman has suffered from the eating disorder for 10 years and has been admitted to hospital three times - at one point she weighed just three stone.
The court heard the woman has refused four out of seven oral nutritional supplements in the last 24 hours.
The Health and Safety Executive's application to the court was supported by the woman's parents.
The president of the High Court Mr Justice Nicholas Kearns said it was a life or death situation and he was making an order to feed the woman as advised by her medical team.
The case will be back before the court next Tuesday.
© UTV News