Patients with established COPD admitted to the Department of Pulmonary Medicine at Landspitali National University Hospital from September 2014-September 2016 will be screened for malnutrition using the NRS2002 screening tool, recommended by ESPEN. Those identified at risk of malnutrition and are able to give informed consent will be recruited. According to the Hospital statistics and previous studies on the frequency of malnutrition in this patient group, the time frame for recruitment is long enough to recruit 200 subjects who will be randomised into the two study groups (~ 3 subjects per week).