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Nutrition plays a key role in blood pressure (BP) regulation. Here, we examine associations between nutrient intakes and BP in a large predominantly female population-based cohort. We assessed the correlation between 45 nutrients (from food frequency questionnaires) and systolic BP/diastolic BP (SBP/DBP) in 3889 individuals from TwinsUK not on hypertensive treatments and replicated in an independent subset of monozygotic twins discordant for nutrient intake (17-242 pairs). Results from both analyses were meta-analysed. For significant nutrients, we calculated heritability using structural equation modelling. We identified and replicated 15 nutrients associated with SBP, 9 also being associated with DBP, adjusting for covariates and multiple testing. 14 of those had a heritable component ( h  2 : 27.1-57.6%). Strong associations with SBP were observed for riboflavin (Beta(SE) = -1.49(0.38), P = 1.00 × 10 -4 ) and tryptophan (-0.31(0.01), P = 5 × 10 -4 ), while with DBP for alcohol (0.05(0.07), P = 1.00 × 10 -4 ) and lactose (-0.05(0.0), P = 1.3 × 10 -3 ). Two multivariable nutrient scores, combining independently SBP/DBP-associated nutrients, explained 22% of the variance in SBP and 13.6% of the variance in DBP. Moreover, bivariate heritability analysis suggested that nutrients and BP share some genetic influences. We confirm current understanding and extend the panel of dietary nutrients implicated in BP regulation underscoring the value of nutrient focused dietary research in preventing and managing hypertension.

Dietary Influence on Systolic and Diastolic Blood Pressure in the TwinsUK Cohort