There’s a long history of studies of melatonin as a sleep aid, but more recently there has also been research with human participants suggesting that this hormone may be helpful not only in regulating sleep patterns but also in lowering blood pressure.
High blood pressure or hypertension poses a risk over the long term to the cardiovascular system, and it’s now widely agreed that controlling hypertension is one of the most significant steps people can take to prevent adverse events such as heart attack.
Using melatonin as an aid to lowering blood pressure presents some advantages over prescription medications used for this purpose, since the prescription drugs often have unwanted side effects such as decreased sexual performance and fatigue.
Note that when low-dose melatonin was used at bedtime to reduce blood pressure in a Harvard Univ. study, the decrease in blood pressure was not dramatic, but still significant enough to help those with borderline blood pressure problems.
Of course anyone interested in the potential of melatonin supplementation for control of blood pressure should consult with a doctor before using.
For further information on this supplement, including comments on dosing, see the NYBC entries: