Inclusion Criteria:  ≥ 35 years Severe COPD defined as GOLD grade 2 group B or D OR GOLD grade 3 and 4 group ABCD Able to eat orally Live in own home Speak Danish or English Undernourished OR at risk of undernutrition defined as BMI ≤ 21 kg/m2 if < 70 years and BMI <22 kg/m2 if ≥70 years OR BMI 21-25 kg/m2 plus nutritional risk (nutritional risk screening score ≥3) if <70 years and BMI 22-25 kg/m2 plus nutritional risk if ≥70 years Stable phase  Exclusion Criteria:  Active solid cancer" defined as cancer diagnosed within the previous six months, recurrent, regionally advanced, or metastatic cancer, cancer for which treatment had been administered within six months or hematological cancer that is not in complete remission Unable to sign informed consent e.g. due to severe dementia. Severe chronic renal failure defined as estimated glomerular filtration rate < 30 mL/min./1.73 m2 (ICD-10 codes N18.4 and N18.5 Severe alcohol abuse (ICD-10 codes F10.2 and K70.x).