Calcium: Those who took a calcium supplement had a mild decrease in BP. Doctors said calcium helped blood vessels relax.
Coenzyme Q10 (CoQ10): In a review of several CoQ10 studies, systolic BP was 16 mmHg lower on average for CoQ10 users compared to placebo.
Flavonoids: Diets high in cocoa appeared to lower systolic BP by 3 to 5 mmHg.
Folate: Those whose diets are low in folate are more likely to have elevated BP, and women who took folic acid supplements were less likely to have high BP.
Garlic: Several studies showed garlic extract lowered BP 10 to 16 mmHg.
Potassium: Diets low in potassium can cause a rise in blood pressure.
Vitamin D: People with high BP were more likely to have low levels of vitamin D compared to those with normal BP, and systolic BP decreased 2.4 mmHg after taking a vitamin D supplement.