Older people have an increased risk of becoming malnourished when they are ill. Admission to hospital may affect their nutritional intake and nutritional status. Nutrition screening and implementation of nutrition care plans can help minimise the risk of malnutrition in acute care settings, if used effectively. The nutritional care provided to older inpatients should be timely, co-ordinated, reviewed regularly and communicated effectively between healthcare professionals and across shifts. This article explores what malnutrition means, why older people in hospital might be at risk of malnutrition and the effect hospital admission might have on nutrition and fluid intake. It makes suggestions for addressing these issues, encourages nurses to look at the nutritional care provided in their clinical area, to reflect on what they do well and consider what can be done to improve patients’ experiences.