RESUMO
BACKGROUND AND OBJECTIVES: A considerable proportion of older adults are lactose intolerant. The aim of this study was to investigate the clinical safety, efficacy, and tolerability of a chicken-based oral nutritional supplement (ONS). METHODS AND STUDY DESIGN: Double-blind randomized controlled trial. Subjects in the intervention group received chicken-based ONS, and those in the control group received a similarly flavored oral fluid placebo. All subjects were followed-up every two months for a total of 6 months. RESULTS: Thirty-eight older adults aged ≥70 years were recruited. The mean age and BMI were 81.5±5.6 years and 19.6±2.5 kg/m2. At the end of this trial, there was no statistically significant change in sarcopenia-related variables in the intervention group. However, the higher-level physical activity (PA) group within the intervention group had a significantly improved usual gait speed (UGS) compared to the lower-level PA group (p=0.04). The adjusted mean differences in UGS between the high and low level PA groups in the intervention and placebo groups were 0.149 m/sec and 0.083 m/sec, respectively. Significant difference was observed for changes in two bone markers between the intervention and placebo groups. CONCLUSIONS: The chicken-based ONS evaluated in this study was well-tolerated. No improvement of sarcopenia-related components was shown by the study ONS. Up to nearly an 80% increase in adjusted mean difference in UGS between the high and low level PA groups was observed in the nutritional intervention group compared to the zero-protein calorie placebo group. Significant improvement in age-related bone resorption was the earliest advantage of taking our ONS.