Effect of overweight and obesity on the equilibrium time, but no in the total body water and body composition compartments in women subjects over 60 years of age Influencia del sobrepeso y la obesidad sobre el tiempo de equilibrio del deuterio, pero no en

Abstract

© 2015, Grupo Aula Medica S.A. All rights reserved.Introduction: aging and obesity cause changes in water exchange rate, which could affect the equilibrium time of deuterium oxide (2H2O). Objective: to assess the effect of overweight and obesity on the equilibrium time of the stable isotope deuterium in saliva samples of older adults. Methods: a sample of 18 women over 63 years with a body mass index (BMI) of 20.8 to 40.5 kg/m2 were included. A basal saliva sample was took and immediately a dose of 30 g of2H2O was administered orally. Saliva samples at 2, 2.5, 3, 3.5 and 4 hours post-dose were taken. Deuterium in saliva samples were analyzed by Fourier Transform Infrared spectroscopy technique. Results: the average in equilibrium time (plateau) in women of normal BMI (18.5-24.9 kg/m2) was 3.6 ± 0.2 hours, which was statistically different to those obtained in the group with overweight (25-29.9 kg/m2) and obese (>30 kg/m2) of 2.9 ± 0.4 hours and 2.8 ± 0.4 hours, respectively (p<0.05). T