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- W2022205617 abstract "We have investigated the effect on blood pressure of treatment with vitamin C (an antioxidant and free radical scavenger) in patients with both systolic and essential hypertension. Following a 2-week run-in phase, two age- and sex-matched groups of untreated hypertensive subjects were randomised in a double-blind study to receive 6 weeks' oral treatment with either vitamin C, 250 mg twice daily (n = 22; 8M/14F, mean age 73.7 +/- 4.9 years) or placebo, one capsule twice daily (n = 26; 10M/16F, mean age 73.8 +/- 5.3 years). Blood pressure was measured in the sitting position using a random zero sphygmomanometer on three occasions during the run-in phase, and again at 2, 4 and 6 weeks after commencing treatment. Venous blood samples for measurement of plasma ascorbic acid (AA) and lipid peroxides (LP) were measured in all subjects at baseline and at 4 and 6 weeks after the start of vitamin C or placebo treatment. During the study period, significant falls in both systolic (vitamin C group, mean change -10.3 (95% CI 0.7-20.0) mm Hg, p = 0.05) and diastolic (vitamin C group, mean change -5.9 (95% CI 0.2-11.5) mm Hg, p = 0.03; placebo group, mean change -4.7 (95% CI 0.3-9.1) mm Hg, p = 0.05) blood pressure occurred. However, no statistical difference between the effects of either treatment on blood pressure was observed. At baseline, AA concentrations were lower in the vitamin C-treated group compared with the placebo group (44.6 +/- 2.4 vs. 57.7 +/- 4.2 mumol/l, p < 0.05).(ABSTRACT TRUNCATED AT 250 WORDS)" @default.
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- W2022205617 date "1994-01-01" @default.
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- W2022205617 title "A Double-Blind, Placebo-Controlled Parallel Trial of Vitamin C Treatment in Elderly Patients with Hypertension" @default.
- W2022205617 doi "https://doi.org/10.1159/000213595" @default.
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