Clinical trial, with positive findings, on 171 patients with psoriasis who were attending a Dermatology Centre in the USA. Approximately half of the patients were randomly allocated to receive a homeopathic ointment called Mahonia (trade name, Reliéva), and the others received dummy ointment (placebo); they were not told which treatment group they were in. After 12 weeks of treatment, patients receiving Reliéva ointment had less severe psoriasis symptoms and better quality of life than those who received placebo ointment PubMed Link
Clinical trial, with positive findings, on 80 patients with psoriasis who were attending doctors’ or dermatology clinics in Germany. The patients applied a homeopathic ointment called Mahonia to one side of their body, and dummy ointment (placebo) to the other side; they were not told which ointment was which. After an average treatment period of 4 weeks, patients reported greater improvement in symptoms on the Mahonia-treated side than on the placebo-treated side. The doctors, however, did not find a difference in outcome between the two ointments.Wiesenauer M, Lüdtke R (1996). Mahonia aquifolium in patients with Psoriasis vulgaris – an intraindividual study. Phytomedicine; 3: 231-235.