This meta-analysis supports a strong connection between low vitamin D and hypertension.
At the 2013 European Human Genetics conference in Paris, France, researchers discussed the largest study to ever examine a link between hypertension and vitamin D deficiency. Dr. Vimal Karani Santhanakrishnan of the University College London said the results demonstrated “a significant link; for every 10% increase in 25(OH)D concentrations, there was a 8.1% decrease in the risk of developing hypertension.” The conclusion: “Our study strongly suggests that some cases of cardiovascular disease could be prevented through vitamin D supplements or food fortification.”
Santhanakrishnan, V. K. (2013, June). Genetic research clarifies link between hypertension and Vitamin D deficiency. Presented at 2013 European Human Genetics Conference, Paris, France. https://www.eshg.org/474.0.html