MAÏA - MAintain the Level of Independence Through Alimentation

Plain-language summary

Malnutrition has serious consequences: increased risk of falls, hospitalization and mortality. Malnutrition may accompany or aggravate another geriatric syndrome. The loss of muscle mass and function, called "sarcopenia" can itself lead to a loss of physical activity and therefore of independence. It has been reported that changes in the quantity or quality of food intake could influence the onset or progression of sarcopenia. Thus, an optimized oral diet covering the energy and protein needs of the elderly people living in a nursing home is a key element of the malnutrition prevention strategy. It could help slow down the loss of independence and have a direct impact on the occurrence of the complications mentioned above, and therefore on the use of care. In the elderly, as in the general population, the consumption of linoleic acid (LA), precursor of the omega 6 line, is too high, and that of alpha-linolenic acid (ALA), precursor of the omega 3 line, insufficient. The French National Institute against Cancer (INCA) 3 survey results indicate for the 65-79 year old population average ALA intakes of 0.9 g/d whereas the recommendation is 2 g/d. The same is true for long-chain n-3 PUFAs (eicosapentaenoic acid (EPA), docosahexaenoic acid (DHA)). There are currently no recommendations specifically concerning nursing home populations. Only recommendations for non-frail people, over the age of 65, exist (ANSES, 2019). Experts recommend maintaining or even slightly increasing the consumption of portions of meat, eggs, fish, fruits and vegetables and dairy products. In the elderly, as in adults, an imbalance of n-6/n-3 PUFA intake or insufficient n-3 PUFA intake could facilitate the occurrence of cardiovascular diseases and certain cancers. The possible prevention of other pathologies more specific to the elderly, such as degenerative diseases, makes the consumption of n-3 PUFAs relevant in this population. Our approach aiming to cover the recommended dietary allowances (RDA) of n-3 PUFAs via the oral diet is therefore very original. An oral diet containing these different sources of fatty acid intake, of various origins, and other essential nutrients for the elderly, would have the advantage of meeting the nutritional objectives on the one hand, and of offering a wide range of tastes, flavors, and texture, allowing to optimize their consumption by nursing home residents, on the other hand. No study has yet evaluated the benefits of n-3 PUFA intake in dependent elderly people residing in nursing homes, moreover, using loss of independence as the main endpoint. The main objective of the trial is to evaluate the effect of an everyday diet containing n-3 PUFA intakes corresponding to the RDA (population \> 65 years) compared to the usual diet (therefore uncontrolled) on the evolution of the loss of independence at 2 years of nursing home residents.

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