2025
- 1.Bescos R, Gallardo-Alfaro L, Ashor A, Rizzolo-Brime L, Siervo M, Casas-Agustench P. Nitrate and nitrite bioavailability in plasma and saliva: Their association with blood pressure - A systematic review and meta-analysis. Free radical biology & medicine [Internet]. United States; 2025 Jan.;226:70-83. https://pubmed.ncbi.nlm.nih.gov/39522567In this study, we conducted a systematic review and meta-analysis to determine plasma and salivary nitrate (NO(3)(-)) and nitrite (NO(2)(-)) concentrations under resting and fasting conditions in different type of individuals and their association with blood pressure levels. A total of 77 studies, involving 1918 individuals aged 19-74 years (males = 906; females = 1012), which measured plasma and/or salivary NO(3)(-) and NO(2)(-) using the chemiluminescence technique, were included. Mean plasma NO(3)(-) and NO(2)(-) concentrations were 33.9 μmol/L and 158.3 nmol/L, respectively. Subgroup analyses revealed lower plasma NO(3)(-) and NO(2)(-) concentrations in individuals with cardiometabolic risk (NO(3)(-): 21.2 μmol/L; 95 % CI, 13.4-29.0; NO(2)(-): 122.8 nmol/L; 95 % CI, 75.3-138.9) compared to healthy (NO(3)(-): 33.9 μmol/L; 95 % CI, 29.9-37.9; NO(2)(-): 159.5 nmol/L; 95 % CI, 131.8-187.1; P < 0.01) and trained individuals (NO(3)(-): 43.0 μmol/L; 95 % CI, 13.2-72.9; NO(2)(-): 199.3 nmol/L; 95 % CI, 117.6-281; P < 0.01). Mean salivary NO(3)(-) and NO(2)(-) concentrations were 546.2 μmol/L and 197.8 μmol/L, respectively. Salivary NO(3)(-), but no NO(2)(-), concentrations were higher in individuals with cardiometabolic risk (680.0 μmol/L; 95 % CI, 510.2-849.8; P = 0.001) compared to healthy individuals (535.9 μmol/L; 95 % CI, 384.2-687.6). A significant positive association (coefficient, 15.4 [95 % CI, 0.255 to 30.5], P = 0.046) was observed between salivary NO(3)(-) and diastolic blood pressure (DBP). These findings suggest that the health status is positively associated with plasma NO(3)(-) and NO(2)(-) concentrations, but the circulatory levels of these anions are not associated with blood pressure. Only salivary NO(3)(-) showed a significant positive association with DBP.
@article{bescos2025nitrate,
abstract = {In this study, we conducted a systematic review and meta-analysis to determine plasma and salivary nitrate (NO(3)(-)) and nitrite (NO(2)(-)) concentrations under resting and fasting conditions in different type of individuals and their association with blood pressure levels. A total of 77 studies, involving 1918 individuals aged 19-74 years (males = 906; females = 1012), which measured plasma and/or salivary NO(3)(-) and NO(2)(-) using the chemiluminescence technique, were included. Mean plasma NO(3)(-) and NO(2)(-) concentrations were 33.9 μmol/L and 158.3 nmol/L, respectively. Subgroup analyses revealed lower plasma NO(3)(-) and NO(2)(-) concentrations in individuals with cardiometabolic risk (NO(3)(-): 21.2 μmol/L; 95 % CI, 13.4-29.0; NO(2)(-): 122.8 nmol/L; 95 % CI, 75.3-138.9) compared to healthy (NO(3)(-): 33.9 μmol/L; 95 % CI, 29.9-37.9; NO(2)(-): 159.5 nmol/L; 95 % CI, 131.8-187.1; P < 0.01) and trained individuals (NO(3)(-): 43.0 μmol/L; 95 % CI, 13.2-72.9; NO(2)(-): 199.3 nmol/L; 95 % CI, 117.6-281; P < 0.01). Mean salivary NO(3)(-) and NO(2)(-) concentrations were 546.2 μmol/L and 197.8 μmol/L, respectively. Salivary NO(3)(-), but no NO(2)(-), concentrations were higher in individuals with cardiometabolic risk (680.0 μmol/L; 95 % CI, 510.2-849.8; P = 0.001) compared to healthy individuals (535.9 μmol/L; 95 % CI, 384.2-687.6). A significant positive association (coefficient, 15.4 [95 % CI, 0.255 to 30.5], P = 0.046) was observed between salivary NO(3)(-) and diastolic blood pressure (DBP). These findings suggest that the health status is positively associated with plasma NO(3)(-) and NO(2)(-) concentrations, but the circulatory levels of these anions are not associated with blood pressure. Only salivary NO(3)(-) showed a significant positive association with DBP.},
address = {United States},
author = {Bescos, Raul and Gallardo-Alfaro, Laura and Ashor, Ammar and Rizzolo-Brime, Lucia and Siervo, Mario and Casas-Agustench, Patricia},
journal = {Free radical biology & medicine},
keywords = {grapp-caib},
month = {jan},
pages = {70--83},
title = {Nitrate and nitrite bioavailability in plasma and saliva: Their association with blood pressure - A systematic review and meta-analysis},
volume = 226,
year = 2025
}%0 Journal Article
%1 bescos2025nitrate
%A Bescos, Raul
%A Gallardo-Alfaro, Laura
%A Ashor, Ammar
%A Rizzolo-Brime, Lucia
%A Siervo, Mario
%A Casas-Agustench, Patricia
%C United States
%D 2025
%J Free radical biology & medicine
%P 70--83
%R 10.1016/j.freeradbiomed.2024.11.010
%T Nitrate and nitrite bioavailability in plasma and saliva: Their association with blood pressure - A systematic review and meta-analysis
%U https://pubmed.ncbi.nlm.nih.gov/39522567
%V 226
%X In this study, we conducted a systematic review and meta-analysis to determine plasma and salivary nitrate (NO(3)(-)) and nitrite (NO(2)(-)) concentrations under resting and fasting conditions in different type of individuals and their association with blood pressure levels. A total of 77 studies, involving 1918 individuals aged 19-74 years (males = 906; females = 1012), which measured plasma and/or salivary NO(3)(-) and NO(2)(-) using the chemiluminescence technique, were included. Mean plasma NO(3)(-) and NO(2)(-) concentrations were 33.9 μmol/L and 158.3 nmol/L, respectively. Subgroup analyses revealed lower plasma NO(3)(-) and NO(2)(-) concentrations in individuals with cardiometabolic risk (NO(3)(-): 21.2 μmol/L; 95 % CI, 13.4-29.0; NO(2)(-): 122.8 nmol/L; 95 % CI, 75.3-138.9) compared to healthy (NO(3)(-): 33.9 μmol/L; 95 % CI, 29.9-37.9; NO(2)(-): 159.5 nmol/L; 95 % CI, 131.8-187.1; P < 0.01) and trained individuals (NO(3)(-): 43.0 μmol/L; 95 % CI, 13.2-72.9; NO(2)(-): 199.3 nmol/L; 95 % CI, 117.6-281; P < 0.01). Mean salivary NO(3)(-) and NO(2)(-) concentrations were 546.2 μmol/L and 197.8 μmol/L, respectively. Salivary NO(3)(-), but no NO(2)(-), concentrations were higher in individuals with cardiometabolic risk (680.0 μmol/L; 95 % CI, 510.2-849.8; P = 0.001) compared to healthy individuals (535.9 μmol/L; 95 % CI, 384.2-687.6). A significant positive association (coefficient, 15.4 [95 % CI, 0.255 to 30.5], P = 0.046) was observed between salivary NO(3)(-) and diastolic blood pressure (DBP). These findings suggest that the health status is positively associated with plasma NO(3)(-) and NO(2)(-) concentrations, but the circulatory levels of these anions are not associated with blood pressure. Only salivary NO(3)(-) showed a significant positive association with DBP.