I am always interested in supplements and herbs that lower blood pressure. I utilize citrulline, magnesium, hawthorn and globe artichoke to lower blood pressure.
A study from Thomas Jefferson University found out that melatonin supplements lowered blood pressure in both young and older patients. It was a small study group and more studies needs to be done. The dose used was 9 mg for those in the melatonin group . There was a significant lower BP of 7.3 mm Hg in the melatonin group versus non melatonin group