Objective: Historical and contemporary research has posited links between eating disorders and religious asceticism. This study aimed to examine relationships between eating disorders, religion, and treatment.Method: Qualitative study using purposeful sampling, applying audiotaped and transcribed depth interview, subjected to interpretative phenomenological analysis.Results: Participants were 10 adult Christian women receiving inpatient treatment for anorexia or bulimia nervosa. Five dominant categories emerged: locus of control, sacrifice, self-image, salvation, maturation. Appetitive control held moral connotations. Negative self-image was common, based more on sin than body-image. Medical treatment could be seen as salvation, with religious conversion manifesting a quest for healing, but treatment failure threatened faith. Beliefs matured during treatment, with prayer, providing a healing relationship.Conclusion: Religious beliefs impact on attitudes and motivation in eating disorders. Clinicians' sensitivity determines how beliefs influence clinical outcome. Treatment modifies beliefs such that theological constructs of illness cannot be ignored.