scholarly journals Dietary Sodium and Blood Pressure in Older Adults

2006 ◽  
Vol 4 (2) ◽  
pp. 25-46
Author(s):  
Courtney B. Johnson
Keyword(s):  
Public Health ◽  
Blood Pressure ◽  
Older Adults ◽  
Healthy Aging ◽  
Sodium Intake ◽  
Urinary Sodium ◽  
Dietary Sodium ◽  
Food Sources ◽  
Major Food ◽  
Increased Risk

Given the proportion of older adults who are hypertensive and the population of older adults who are at risk for hypertension, the U.S. must mobilize public health efforts aimed at prevention. Scientific evidence has demonstrated the efficacy of sodium reduction to lower blood pressure. Translating this evidence into practice involves knowledge about the food sources of sodium so effective interventions can be designed and implemented. The purpose of this essay was to examine major food group sources of sodium in a cohort of older adults, with and without high blood pressure, in an urban community in Southwestern Pennsylvania. The University of Pittsburgh's "Center for Healthy Aging" promotes healthy aging in the community with the "10 Keys to Healthy Aging" campaign. One of the keys aims to lower systolic blood pressure to ≤140 mmHg. A low sodium intervention was implemented by the CHA project in hypertensive individuals. The sodium intake of the 521 community volunteers, mean age 74.5 years, 60% male, 94.1% white, who completed a FFQ, was compared to a sub-sample of hypertensives (n=214) who, in addition, collected one 24-hour urinary sodium. Mean baseline dietary sodium for the entire cohort was 1,796 mg per day compared to 1,821 mg per day in hypertensives. Urinary sodium was 1.8 times higher (141 mmol/24 hrs [3,240 mg]) than self-reported intake and decreased to 130 mmol/24 hrs (2,990 mg) at 6-months. The correlation between dietary and urinary sodium at baseline was weak (r=0.16) and remained weak (0.23) at 6-months. Major food sources of sodium were soups, breads, tomato sauce, salad dressings, and prepared cereals. Data indicate that the sodium intake of the group exceeds the 2005 Dietary Guidelines of ≤1500 mg per day by approximately 200% for individuals at increased risk using urinary sodium values. Even the most successful dietary interventions to reduce sodium intake to the recommended levels would be ineffective without the food industry’s help in reducing sodium added to foods during processing. This prevention strategy, in combination with stronger public health messages, would help to reduce the sodium intake in the population and help to achieve reductions in blood pressures.

scholarly journals Bread Consumption Is Associated with Elevated Blood Pressure among Adults Living in Mexico City–A Sub-Analysis of the Tlalpan 2020 Study

Nutrients ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1969 ◽  
Author(s):  
Xochitl Ponce-Martínez ◽  
Eloisa Colin-Ramirez ◽  
Paulina Sánchez-Puerto ◽  
Susana Rivera-Mancía ◽  
Raúl Cartas-Rosado ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Sodium Intake ◽  
Elevated Blood Pressure ◽  
Dietary Sodium ◽  
Elevated Blood ◽  
Breakfast Cereal ◽  
Cross Sectional ◽  
Cereal Products ◽  
Reference Category ◽  
Increased Risk

Excessive dietary sodium is associated with elevated blood pressure (EBP). Bread products are identified as one of the main sources of daily sodium intake. The objective of this cross-sectional study was to evaluate the association between bread and others cereal products consumption with EBP. Frequency intake of a standard serving of bread and other cereal products was recorded and categorized as: ≤3 times/month or never (reference category group) and ≥ once/week. EBP was defined as systolic blood pressure (SBP) ≥120 mmHg and/or diastolic blood pressure (DBP) ≥80 mmHg. Raw and adjusted odds ratios (OR) for the association between consumption of the studied food products and blood pressure status were estimated. Overall, 2011 participants aged 37.3 ± 9.1 years old were included. In the models adjusted for relevant covariates, consumption of one piece of bolillo or telera (OR = 1.39; 95% CI = 1.01–1.89) ≥ once/week was associated with an increased risk of EBP, compared to the reference category. Also, participants consuming one bowl of high-fiber breakfast cereal once/week were less likely to have EBP (OR = 0.73; 95% CI = 0.53–0.98). Initiatives to reduce sodium levels in bread products such as bolillo and telera are needed in Mexico to help manage the cardiovascular risk at the population level.

scholarly journals Potassium-Enriched Salt Substitutes as a Means to Lower Blood Pressure

Hypertension ◽  
2020 ◽  
Vol 75 (2) ◽  
pp. 266-274 ◽  
Author(s):  
Raquel C. Greer ◽  
Matti Marklund ◽  
Cheryl A.M. Anderson ◽  
Laura K. Cobb ◽  
Arlene T. Dalcin ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Sodium Chloride ◽  
Potassium Chloride ◽  
Sodium Intake ◽  
Population Level ◽  
Dietary Sodium ◽  
Current Evidence ◽  
Lower Blood Pressure ◽  
Increased Risk ◽  
Lower Blood

Use of salt substitutes containing potassium chloride is a potential strategy to reduce sodium intake, increase potassium intake, and thereby lower blood pressure and prevent the adverse consequences of high blood pressure. In this review, we describe the rationale for using potassium-enriched salt substitutes, summarize current evidence on the benefits and risks of potassium-enriched salt substitutes and discuss the implications of using potassium-enriched salt substitutes as a strategy to lower blood pressure. A benefit of salt substitutes that contain potassium chloride is the expected reduction in dietary sodium intake at the population level because of reformulation of manufactured foods or replacement of sodium chloride added to food during home cooking or at the dining table. There is empirical evidence that replacement of sodium chloride with potassium-enriched salt substitutes lowers systolic and diastolic blood pressure (average net Δ [95% CI] in mm Hg: –5.58 [–7.08 to –4.09] and –2.88 [–3.93 to –1.83], respectively). The risks of potassium-enriched salt substitutes include a possible increased risk of hyperkalemia and its principal adverse consequences: arrhythmias and sudden cardiac death, especially in people with conditions that impair potassium excretion such as chronic kidney disease. There is insufficient evidence regarding the effects of potassium-enriched salt substitutes on the occurrence of hyperkalemia. There is a need for additional empirical research on the effect of increasing dietary potassium and potassium-enriched salt substitutes on serum potassium levels and the risk of hyperkalemia, as well as for robust estimation of the population-wide impact of replacing sodium chloride with potassium-enriched salt substitutes.

scholarly journals Association between 24-h urinary sodium and potassium excretion and blood pressure among Chinese adults aged 18–69 years

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Xiaofu Du ◽  
Le Fang ◽  
Jianwei Xu ◽  
Xiangyu Chen ◽  
Yamin Bai ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Sodium Excretion ◽  
Sodium Intake ◽  
Urinary Sodium Excretion ◽  
Urinary Sodium ◽  
Inverse Association ◽  
Potassium Excretion ◽  
Chinese Adults ◽  
Potassium Intake ◽  
Sodium And Potassium

AbstractThe direction and magnitude of the association between sodium and potassium excretion and blood pressure (BP) may differ depending on the characteristics of the study participant or the intake assessment method. Our objective was to assess the relationship between BP, hypertension and 24-h urinary sodium and potassium excretion among Chinese adults. A total of 1424 provincially representative Chinese residents aged 18 to 69 years participated in a cross-sectional survey in 2017 that included demographic data, physical measurements and 24-h urine collection. In this study, the average 24-h urinary sodium and potassium excretion and sodium-to-potassium ratio were 3811.4 mg/day, 1449.3 mg/day, and 4.9, respectively. After multivariable adjustment, each 1000 mg difference in 24-h urinary sodium excretion was significantly associated with systolic BP (0.64 mm Hg; 95% confidence interval [CI] 0.05–1.24) and diastolic BP (0.45 mm Hg; 95% CI 0.08–0.81), and each 1000 mg difference in 24-h urinary potassium excretion was inversely associated with systolic BP (− 3.07 mm Hg; 95% CI − 4.57 to − 1.57) and diastolic BP (− 0.94 mm Hg; 95% CI − 1.87 to − 0.02). The sodium-to-potassium ratio was significantly associated with systolic BP (0.78 mm Hg; 95% CI 0.42–1.13) and diastolic BP (0.31 mm Hg; 95% CI 0.10–0.53) per 1-unit increase. These associations were mainly driven by the hypertensive group. Those with a sodium intake above about 4900 mg/24 h or with a potassium intake below about 1000 mg/24 h had a higher risk of hypertension. At higher but not lower levels of 24-h urinary sodium excretion, potassium can better blunt the sodium-BP relationship. The adjusted odds ratios (ORs) of hypertension in the highest quartile compared with the lowest quartile of excretion were 0.54 (95% CI 0.35–0.84) for potassium and 1.71 (95% CI 1.16–2.51) for the sodium-to-potassium ratio, while the corresponding OR for sodium was not significant (OR, 1.28; 95% CI 0.83–1.98). Our results showed that the sodium intake was significantly associated with BP among hypertensive patients and the inverse association between potassium intake and BP was stronger and involved a larger fraction of the population, especially those with a potassium intake below 1000 mg/24 h should probably increase their potassium intake.

scholarly journals The Effects of Short-Term Changes in Sodium Intake on Plasma Marinobufagenin Levels in Patients with Primary Salt-Sensitive and Salt-Insensitive Hypertension

Nutrients ◽  
2021 ◽  
Vol 13 (5) ◽  
pp. 1502
Author(s):  
Katarzyna Łabno-Kirszniok ◽  
Agata Kujawa-Szewieczek ◽  
Andrzej Wiecek ◽  
Grzegorz Piecha
Keyword(s):  
Blood Pressure ◽  
Diastolic Blood Pressure ◽  
Sodium Intake ◽  
Left Ventricular ◽  
Primary Hypertension ◽  
Dietary Sodium ◽  
Sodium Restriction ◽  
Short Term ◽  
Salt Loading ◽  
Dietary Sodium Restriction

Increased marinobufagenin (MBG) synthesis has been suggested in response to high dietary salt intake. The aim of this study was to determine the effects of short-term changes in sodium intake on plasma MBG levels in patients with primary salt-sensitive and salt-insensitive hypertension. In total, 51 patients with primary hypertension were evaluated during acute sodium restriction and sodium loading. Plasma or serum concentrations of MBG, natriuretic pro-peptides, aldosterone, sodium, potassium, as well as hematocrit (Hct) value, plasma renin activity (PRA) and urinary sodium and potassium excretion were measured. Ambulatory blood pressure monitoring (ABPM) and echocardiography were performed at baseline. In salt-sensitive patients with primary hypertension plasma MBG correlated positively with diastolic blood pressure (ABPM) and serum NT-proANP concentration at baseline and with serum NT-proANP concentration after dietary sodium restriction. In this subgroup plasma MBG concentration decreased during sodium restriction, and a parallel increase of PRA was observed. Acute salt loading further decreased plasma MBG concentration in salt-sensitive subjects in contrast to salt insensitive patients. No correlation was found between plasma MBG concentration and left ventricular mass index. In conclusion, in salt-sensitive hypertensive patients plasma MBG concentration correlates with 24-h diastolic blood pressure and dietary sodium restriction reduces plasma MBG levels. Decreased MBG secretion in response to acute salt loading may play an important role in the pathogenesis of salt sensitivity.

Are older adults with excessive sodium intake at increased risk of hypohydration?

2021 ◽  
Author(s):  
Marta Gamba ◽  
Pedro Moreira ◽  
Nuno Borges ◽  
Alejandro Santos ◽  
Cláudia Afonso ◽  
...  
Keyword(s):  
Older Adults ◽  
Sodium Intake ◽  
Increased Risk

Abstract MP009: Changes in Aldosterone are Associated With Changes in Obesity-Related Factors in Normotensive Overweight/Obese Young Adults Undergoing Lifestyle Modification

Circulation ◽  
2012 ◽  
Vol 125 (suppl_10) ◽  
Author(s):  
Jennifer Cooper ◽  
Linda Fried ◽  
Ping Tepper ◽  
Emma Barinas-Mitchell ◽  
Kim Sutton-Tyrrell
Keyword(s):  
Insulin Resistance ◽  
Blood Pressure ◽  
Weight Loss ◽  
Young Adults ◽  
Lifestyle Modification ◽  
Urinary Sodium ◽  
Dietary Sodium ◽  
Related Factor ◽  
Related Factors ◽  
Aldosterone Antagonists

Background: Elevated aldosterone promotes inflammation, insulin resistance, and hypertension. These effects are particularly important in obesity because adipocytes secrete factors that increase aldosterone production. Weight loss is thought to lower aldosterone levels, but little longitudinal data is available. We aimed to determine if, independent of changes in sodium intake, reductions in circulating aldosterone are associated with weight loss and improvements in inflammation, adipokines, insulin resistance, and blood pressure in normotensive overweight and obese young adults undergoing lifestyle modification. Methods: Participants were overweight/obese adults aged 20–45 years (20% male, 15% black) from the Slow Adverse Vascular Effects of excess weight trial, a study evaluating the relationships between weight loss, dietary sodium, and vascular health. Subjects were randomly assigned to a regular or reduced sodium diet, and all received a one-year nutrition and physical activity intervention. For this study, individuals providing valid baseline 24hr urine collections were included (n=281). Linear mixed models were used to evaluate associations between changes in aldosterone and changes in weight, blood pressure, and obesity-related factors. Results: Weight loss was significant at 6 months (∼7%), 12 months (∼6%), and 24 months (∼4%) (p<0.0001 for all). Within-subject decreases in aldosterone were associated with decreases in C-reactive protein, leptin, and homeostasis assessment of insulin resistance (HOMA-IR) and with increases in adiponectin (p<0.01 for all) in models including baseline age, sex, race, intervention arm, time since baseline, and baseline and concurrent changes in BMI, urinary sodium and potassium, and the obesity-related factor of interest. Decreases in aldosterone were associated with weight loss only in the subgroup (n=98) with metabolic syndrome (MetS) at baseline (MetS x percent weight loss p=0.02); a 10% weight reduction in this subgroup was associated with a 9% (95% CI 1–16) reduction in aldosterone. Though no association was detected between changes in aldosterone and mean arterial pressure (MAP), a significant association was found between reductions in MAP and 24hr urinary sodium in those with MetS (MetS x urinary sodium reduction p=0.02). Independent of weight loss, a 30% reduction in urinary sodium was associated with a 0.9 mm Hg (95% CI 0.2–1.6) decrease in MAP in those with MetS. Conclusions: Changes in aldosterone are associated with changes in obesity-related factors in overweight/obese normotensive young adults. In persons with MetS, weight loss and dietary sodium restriction are particularly useful to reduce aldosterone and MAP respectively. Given the adverse effects of excess aldosterone on cardiac and vascular remodeling, future studies should investigate the benefits of aldosterone antagonists in individuals with MetS.

Abstract P276: A High Sodium Diet Reduces Cutaneous Microvascular Function In Normotensive Individuals With Salt Sensitive Blood Pressure

Hypertension ◽  
2021 ◽  
Vol 78 (Suppl_1) ◽  
Author(s):  
Jordan C Patik ◽  
Joseph M Stock ◽  
Nathan T Romberger ◽  
Shannon L Lennon ◽  
William B Farquhar ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Vascular Function ◽  
Sodium Intake ◽  
Local Heating ◽  
Urinary Sodium Excretion ◽  
Microvascular Function ◽  
Dietary Sodium ◽  
Heating Unit ◽  
Doppler Flowmetry ◽  
High Sodium

Impaired vascular function likely contributes to the association between dietary sodium intake and the development of cardiovascular disease. Using the cutaneous microvasculature as a model, we have previously shown that a high sodium (HS) diet blunts local heating-induced vasodilation in normotensive individuals with salt resistant (SR) blood pressure (BP). However, the effect of a HS diet on the cutaneous microvasculature in normotensive salt sensitive (SS) individuals remains unclear. Therefore, we tested the hypothesis that cutaneous microvascular function is reduced by a HS diet to a greater degree in SS compared to SR individuals. After each 7-day controlled feeding diet (low sodium (LS) = 20 mmol/day; HS = 300 mmol/day), an intradermal microdialysis fiber was inserted in the ventral forearm and perfused with Ringer’s solution. Skin blood flow (SkBF) was continuously monitored via laser Doppler flowmetry and a local heating unit was placed over the fiber and heated to 42°C until SkBF reached a stable plateau. Site-specific maximal SkBF was determined by perfusing 28mM sodium nitroprusside and heating to 43°C. Mean arterial pressure (MAP) was assessed at regular intervals on the contralateral arm and was used to calculate cutaneous vascular conductance (CVC = SkBF / MAP). Subjects wore a 24-hr ambulatory BP monitor and collected their urine on the final day of each diet. Fourteen subjects (9W / 5M, 42 ± 14 yr) whose MAP increased >5 mmHg (Δ8 ± 1 mmHg) on the HS diet were defined as SS and were compared to 14 age- (43± 14 yr) and sex-matched SR subjects (Δ1 ± 3 mmHg). SS and SR had similar MAP at baseline (88 ± 9 vs. 90 ± 8 mmHg, P = 0.88) and urinary sodium excretion was increased similarly across groups by the HS diet (Δ239 ± 104 vs. Δ220 ± 66 mmol / 24 hr, P = 0.20). Cutaneous vasodilation in response to local heating was decreased on the HS diet relative to the LS diet in both SS (Δ-9 ± 9 %CVCmax, P = 0.005) and SR (Δ-9 ± 9 %CVCmax, P=0.005); however, there was not a group x diet interaction (P = 0.99). In contrast to our hypothesis, these results suggest that the deleterious effects of high sodium diets on cutaneous microvascular function are similar in normotensive salt sensitive and salt resistant individuals.

Sign in / Sign up

Export Citation Format

Share Document