Five studies were evaluated regarding Medical Nutrition Therapy (MNT) in older adults with unintended weight loss. One study reported that the prevalence of underweight or unintended weight loss may be as high as 35%. Four studies report that individualized nutrition care, directed by a Registered Dietitian on the healthcare team, results in improved outcomes related to increased energy, protein and nutrient intakes, improved nutritional status, improved quality of life and/or weight gain.