Home caring for disabled elderly people by (family or professional) caregivers modifies the food diet of households, but these modifications vary with the attendant’s status. The intervention of a home help leads to transformations with the integration of nutritional and dietetic norms but these changes differ with the interaction between the home help (according to age and qualification level) and the elderly person and are not necessarily efficient. Conversely, in cases of family caring, the household tries to keep up the food diet but we observe transformations that depend on the re-organization of food activities. They vary with the help’s status and age (spouse, son/daughter), and the elderly person’s sex and types of disabilities (physical or psychological). The preventive policy aimed at elderly people implemented within the French National Nutrition and Health programme (PNNS) and based upon the up-keep of food diversity should take these social interaction effects into account.