Deterioration of the nutritional status in an elderly person should be identified. Clinical findings alone are not sensitive indicators of malnutrition. Sufficient intake of energy, proteins and other nutrients through diet should be guaranteed. An overweight person less than 75 years of age may slim with caution if he/she has comorbidities. Patients aged over 75 years rarely benefit from slimming programmes. To ensure sufficient intake of vitamin D, a supplementation of 20 microg (800 IU) daily throughout the year is recommended for persons aged over 60 years.