Genetic research and clinical trends in eating disorders

Recent large-scale genetic research published in Nature Mental Health indicates that eating disorders, including anorexia nervosa and binge eating, are complex biological conditions driven by genetic factors distinct from those influencing body weight or BMI.

Studies led by institutions such as King’s College London and the Karolinska Institutet suggest that anorexia nervosa may be a “metabo-psychiatric” illness. Researchers found that genetic associations extend beyond mental health issues like anxiety and depression to include metabolic characteristics, such as lipid levels and blood glucose. By analyzing data from hundreds of thousands of individuals—including approximately 25,000 with anorexia and 40,000 with binge eating behaviors compared against a control group of over 1.2 million—researchers identified specific genetic loci, including eight associated with anorexia nervosa and six with binge eating. These findings suggest that these polygenic disorders involve thousands of genetic variants that indicate a biological vulnerability rather than a fixed destiny.

Complementary clinical data from the Servicio Canario de la Salud (SCS) in the Canary Islands highlights the public health impact of these conditions. In 2025, the SCS treated 1,100 patients for eating disorders through more than 7,400 consultations. Health authorities reported that these disorders affect approximately 4% of the adolescent population in the archipelago, primarily impacting adolescent girls and young adult women. The SCS emphasized the necessity of early detection via primary care, noting increased risks during summer months due to social pressures regarding body image. Additionally, clinical research has noted that eating disorders can lead to physiological consequences such as decreased libido and other sexual health difficulties resulting from hormonal changes and low body mass index.