Clinical trial, at a skin clinic in the USA, with positive findings in a total of 29 patients with seborrhoeic dermatitis (facial eczema with dandruff). Approximately half of the patients were randomly allocated to receive homeopathic medicine and the others received dummy medicine (placebo); they were not told which treatment group they were in. After a period of 10 weeks’ treatment, the group that received the homeopathic medicine reported more improvement in skin symptoms than the group that received placebo.