A project supporting families of people with eating disorders could close because of a loss of funding.
Norwich-based Beat needs £20,000 to continue a project helping the siblings of people with eating disorders for another year.
Property investment company Targetfollow funded the first year but now needs the money for other projects.
Beat chief executive Susan Ringwood called the loss of funding for the project disappointing.
"The project was the first of its kind," she said.
"We had set it up in response to a demand from young people with eating disorders who knew that their brothers and sisters were under a tremendous emotional strain.
"We are extremely grateful to Targetfollow who very kindly funded the first year of the project.
"We were hoping that they would be able to support us for the second year, but due to their existing commitments to other charity and community causes, they were unable to do this."
Targetfollow sponsorship and projects coordinator Jamie Evans said: "We would urge other local business and members of the community to come forward and support this vital and ground breaking project."
Emma Healey, responsible for fundraising at Beat, said: "We need to find £20,000. That is a substantial sum, but this is an opportunity to help make a difference to thousands of young lives."