500 mg per day for 8 weeks of Vitamin C significantly reduced systolic BP by 3.84 mm and diastolic BP by 1.48 mm
Vitamin C helps maintain blood pressure in the normal range
Reference:
Juraschek SP, Guallar E, Appel LJ, Miller ER 3rd. Effects of vitamin C supplementation on blood pressure: a meta-analysis of randomized controlled trials. Am J Clin Nutr. 2012;95(5):1079-88.PMID: 22492364