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Short-term effect of a protein load on appetite and food intake in diseased mildly undernourished elderly people.
Short-term effect of a protein load on appetite and food intake in diseased
mildly undernourished elderly people. Irvine P, Mouzet JB, Marteau CC, Salle A, Genaitay M, Favreau AM, Berrut G, Ritz P. Inserm EMI-U 00.18, Medicine B-CHU, 4 rue Larrey, ANGERS F-49033, Cedex, France. Background & aims: Malnutrition is a risk factor for mortality and various morbidities in the elderly. A low-energy intake often prevails and therapeutic interventions include the administration of dietary supplements, sometimes rich in proteins. We have tested the hypothesis that a protein-rich supplement inhibits appetite and decreases voluntary food intake. Methods: Twelve mildly undernourished (BMI 21.3+/-2.4kg/m(2)) elderly (84+/-7.8yr) diseased persons were each studied under 3 conditions, in which they were given in random order at breakfast, and on consecutive days: either no supplement, a 250kcal, 20g protein supplement or a 250kcal, 3.5g protein supplement. Hunger, fullness, and desire to eat sensations were monitored half-hourly from before breakfast until lunch, and hourly from lunch until dinner. Food intake was assessed by weighing food before and after meals. Total energy and macronutrient intakes were calculated over 24h. Results: Both supplements increased energy intake (+185kcal protein supplement, +176kcal). Protein supplementation induced a net 17g increase in protein intake ( [Formula: see text] ). Neither supplement affected spontaneous food intake at lunch, dinner, or over the 24h. Protein supplementation significantly depressed appetite in the breakfast to lunch period. Conclusion: A 250kcal, 20g protein supplement depresses hunger without affecting food intake in elderly diseased mildly undernourished persons. |
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