Figure 1From: Vitamin C in plasma is inversely related to blood pressure and change in blood pressure during the previous year in young Black and White womenSystolic blood pressure by quartiles of plasma ascorbic acid, NHLBI Growth and Health Study, Richmond, CA cohort, 1996–1997 (tests for linear trend: unadjusted p = 0.0001; adjusted for race, BMI, education, dietary fat, dietary sodium, p = 0.005). Plasma ascorbic acid concentrations by quartile: Q1, 0.59 mg/dL (SD 0.18); Q2, 1.03 mg/dL (SD 0.10); Q3, 1.36 mg/dL (SD 0.10); Q4, 1.83 mg/dL (SD 0.34). (SI units: 33.51 μmol/L, 58.50 μmol/L, 77.25 μmol/L, 103.94 μmol/L)Back to article page