Compliance to Oral Nutritional Supplements (ONS) in Undernourished Frail Older Adults Living at Home.

"Patients are supposed to take Fortimel® Protein once daily during the study period. The prescription is one unit a day.~First prescription of the study product will be done for one month. Prescription will be repeated for 2 additional months only after the patient's nutritional status and its global health status, as well as tolerability and compliance to the ONS, were re-assessed during the first follow-up visit at one month."