TY - JOUR
T1 - Effect of sodium and potassium supplementation on vascular and endothelial function
T2 - A randomized controlled trial
AU - Blanch, Natalie
AU - Clifton, Peter M.
AU - Petersen, Kristina S.
AU - Keogh, Jennifer B.
N1 - Publisher Copyright:
© 2015 American Society for Nutrition.
PY - 2015/5/1
Y1 - 2015/5/1
N2 - Background: It is known that increased potassium and reduced sodium intakes can improve postprandial endothelial function. However, the effect of increasing potassium in the presence of high sodium in the postprandial state is not known. Objective: We aimed to determine the effect of high potassium and high sodium on postprandial endothelial function as assessed by using flow-mediated dilatation (FMD) and arterial compliance as assessed by using pulse wave velocity (PWV) and central augmentation index (AIx). Design: Thirty-nine healthy, normotensive volunteers [21 women and 18 men; mean SD age: 37 15 y; BMI (in kg/m2): 23.0 2.8] received a meal with 3 mmol K and 65 mmol Na (low-potassium, high-sodium meal (LKHN)], a meal with 38 mmol K and 65 mmol Na [high-potassium, high-sodium meal (HKHN)], and a control meal with 3 mmol K and mmol Na (low-potassium, low-sodium meal) on 3 separate occasions in a randomized crossover trial. Brachial artery FMD, carotid-femoral PWV, central AIx, and blood pressure (BP) were measured while participants were fasting and at 30, 60, 90, and 120 min after meals. Results: Compared with the LKHN, the addition of potassium (HKHN) significantly attenuated the postmeal decrease in FMD (P-meal by time interaction ≤ 0.05). FMD was significantly lower after the LKHN than after the HKHN at 30 min (P ≤ 0.01). AIx decreased after all meals (P ≤ 0.05). There were no significant differences in AIx, PWV, or BP between treatments over time. Conclusion: The addition of potassium to a high-sodium meal attenuates the sodium-induced postmeal reduction in endothelial function as assessed by FMD. This trial was registered at http://www.anzctr.org.au/ as ACTRN12613000772741.
AB - Background: It is known that increased potassium and reduced sodium intakes can improve postprandial endothelial function. However, the effect of increasing potassium in the presence of high sodium in the postprandial state is not known. Objective: We aimed to determine the effect of high potassium and high sodium on postprandial endothelial function as assessed by using flow-mediated dilatation (FMD) and arterial compliance as assessed by using pulse wave velocity (PWV) and central augmentation index (AIx). Design: Thirty-nine healthy, normotensive volunteers [21 women and 18 men; mean SD age: 37 15 y; BMI (in kg/m2): 23.0 2.8] received a meal with 3 mmol K and 65 mmol Na (low-potassium, high-sodium meal (LKHN)], a meal with 38 mmol K and 65 mmol Na [high-potassium, high-sodium meal (HKHN)], and a control meal with 3 mmol K and mmol Na (low-potassium, low-sodium meal) on 3 separate occasions in a randomized crossover trial. Brachial artery FMD, carotid-femoral PWV, central AIx, and blood pressure (BP) were measured while participants were fasting and at 30, 60, 90, and 120 min after meals. Results: Compared with the LKHN, the addition of potassium (HKHN) significantly attenuated the postmeal decrease in FMD (P-meal by time interaction ≤ 0.05). FMD was significantly lower after the LKHN than after the HKHN at 30 min (P ≤ 0.01). AIx decreased after all meals (P ≤ 0.05). There were no significant differences in AIx, PWV, or BP between treatments over time. Conclusion: The addition of potassium to a high-sodium meal attenuates the sodium-induced postmeal reduction in endothelial function as assessed by FMD. This trial was registered at http://www.anzctr.org.au/ as ACTRN12613000772741.
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U2 - 10.3945/ajcn.114.105197
DO - 10.3945/ajcn.114.105197
M3 - Article
C2 - 25787997
AN - SCOPUS:84929659417
SN - 0002-9165
VL - 101
SP - 939
EP - 946
JO - American Journal of Clinical Nutrition
JF - American Journal of Clinical Nutrition
IS - 5
ER -