Magnesium May Help Lower High Blood Pressure, New Study Finds
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High blood pressure is one of the leading risk factors for heart disease, affecting nearly one in three adults in Germany. While many people focus on reducing salt intake and increasing potassium, new research suggests that another mineral—magnesium—may play a more important role than previously thought.
A recent analysis from Australia highlights magnesium’s potential to support blood pressure control, particularly in people with hypertension or an existing deficiency.
What the Research Shows
Researchers from the University of New South Wales reviewed 38 clinical studies involving a total of 2,709 participants. Their findings indicate that magnesium supplementation can lead to modest but meaningful reductions in blood pressure—especially in certain groups.
Key findings:
In people with high blood pressure, systolic pressure dropped by an average of 2.96 mmHg, while diastolic pressure decreased by 2.10 mmHg.
Among patients already taking blood pressure medication, the effect was stronger:
Systolic pressure fell by 7.68 mmHg
Diastolic pressure dropped by 2.96 mmHg
Participants with magnesium deficiency experienced particularly notable improvements, with reductions of up to:
6 mmHg systolic
4.75 mmHg diastolic
Understanding Blood Pressure Readings
Blood pressure consists of two values:
Systolic pressure (upper number): the pressure in the arteries when the heart pumps.
The pressure at which the heart relaxes in between beats is known as the diastolic pressure (lower number).
Even small reductions in these numbers can significantly lower the risk of heart attack and stroke over time.
When Magnesium Helps—and When It Doesn’t
The researchers also noted that magnesium does not benefit everyone equally:
No measurable effect was found in people with normal blood pressure
Those without a magnesium deficiency often saw little to no change
In participants not taking blood pressure medication, systolic pressure frequently remained unchanged
Daily magnesium doses in the studies ranged from 82 to 637 milligrams, with an average intake of around 365 milligrams. Importantly, researchers did not observe a clear dose-response relationship—meaning higher doses didn’t necessarily lead to better results.
Why Magnesium Matters for Blood Pressure
Magnesium plays a critical role in several processes that influence cardiovascular health, including:
Regulation of heart rhythm
Relaxation of blood vessels
Control of the renin-angiotensin-aldosterone system, which helps regulate blood pressure
When magnesium levels are too low, these systems may function less effectively, potentially contributing to elevated blood pressure.
How to Increase Magnesium Intake Safely
People looking to improve their magnesium intake can focus on magnesium-rich foods such as:
Green leafy vegetables
Nuts and seeds
Whole grain products
Mineral water with sufficient magnesium content
Supplements should only be taken after consulting a healthcare provider, especially for individuals with kidney disease or those already taking medication.
A Helpful Addition—Not a Replacement
Experts emphasize that magnesium is not a substitute for blood pressure medication, but it may serve as a supportive element within a broader treatment plan. The study authors recommend that healthcare providers pay closer attention to micronutrient levels, including magnesium, in patients with hypertension.
Further large-scale studies are needed to determine whether higher doses or long-term supplementation offer additional benefits.
Bottom Line
Magnesium may offer a small but meaningful benefit for people with high blood pressure—particularly those with a deficiency or those already on medication. While it’s no cure-all, it reinforces the importance of micronutrients in cardiovascular health and highlights diet as a powerful complement to medical treatment.
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