Inclusion Criteria:  Informed Consent as documented by signature Adult (age ≥18 years), medical patients Nutritional risk screening using the Nutritional Risk Screening (NRS): total score ≥3 points consisting of ≥1 points for impairment of the nutritional status [weight loss >5% in 3 month or food intake of 50-75% in the last week before hospital admission] plus ≥1 for the severity of the disease (i.e., cancer, chronic kidney disease, chronic heart failure, COPD) and other chronic diseases according to the definition of the "National Center for Chronic Disease Prevention and Health Promotion": Chronic diseases are defined broadly as conditions that last 1 year or more and require ongoing medical attention or limit activities of daily living or both .  Exclusion Criteria:  after surgery unable to ingest oral nutrition need for long-term nutrition, terminal condition acute pancreatitis or acute liver failure patients discharged to a nursing home patients unlikely to comply with nutritional support treatment (e.g., dementia) COVID-Hospitalisation