Magnesium for Heart Health

Magnesium, an essential mineral, plays a significant role in maintaining heart health. Involved in over 300 biochemical reactions in the body, it is crucial for the proper functioning of the cardiovascular system. This article explores the importance of magnesium in heart health, its benefits, the different forms available for supplementation, and how to ensure you are getting enough of this vital nutrient.


The Importance of Magnesium for Heart Health

Magnesium is involved in various processes that support heart health, such as:

  • Regulating heart muscle contractions
  • Helping blood vessels relax and maintain already-healthy blood pressure
  • Transporting potassium and sodium across cell membranes, promoting healthy heart rhythms
  • Supporting overall cardiovascular health

Due to the mineral's importance in these processes, maintaining optimal magnesium levels is essential for a healthy heart.

Magnesium and Heart Muscle Contractions

Magnesium plays a role in the biochemical reactions in your heart muscle that generate your heartbeat. Calcium stimulates the muscle fibers of the myocardium (heart muscle) to shorten and contract, while magnesium has the opposite effect. Magnesium blocks calcium, allowing the muscle fibers to relax. This intricate biological process creates your heartbeat and is essential for the proper functioning of your cardiovascular system.

Magnesium and Blood Vessel Relaxation

Magnesium can help your blood vessels relax and maintain already-healthy blood pressure. A meta-analysis of 34 trials involving 2,028 participants found that those supplementing with oral magnesium better supported already-healthy blood pressure compared with those who took a placebo.

Magnesium and Heart Rhythms

Magnesium is essential for supporting healthy heart rhythms. It helps transport potassium and sodium across cell membranes, promoting healthy heart rhythms and overall cardiovascular health.

Magnesium is indispensable for a plethora of biological processes, including muscle function, nerve transmission, and energy production. When it comes to heart health, magnesium plays several key roles that help maintain a healthy cardiovascular system.


The Role of Magnesium in Heart Health

  1. Regulating Heartbeat

Magnesium is responsible for maintaining a regular heartbeat. It does so by stabilising the electrical activity in the heart muscle cells, which helps prevent irregular heartbeats (arrhythmias).

Magnesium in the body plays a role in the transport system that carries electrolytes into the various cells. Electrolytes are also vital for managing how nerves and nerve endings work around the heart muscles and how they contract and expand. Without magnesium the heart would stop beating because the nerves that power it are starved of their energy.

  1. Reducing Blood Pressure

Magnesium contributes to the relaxation of blood vessels, which can lower high blood pressure (hypertension). Research has shown that adequate magnesium intake is associated with a reduced risk of developing hypertension.

Magnesium research is showing results in various areas that are linked to good heart health. For example, studies are showing that magnesium supplements can lower blood pressure thus taking pressure off the heart. Likewise, magnesium is known to relax and calm the body and supplementing can reduce stress and subsequent pressures on the heart. Studies have shown a definite link between hypertension and low magnesium levels.

  1. Decreasing Inflammation

Chronic inflammation is a major contributing factor to heart disease. Magnesium has been shown to help reduce inflammation by acting as an anti-inflammatory agent, thereby protecting the heart.

  1. Preventing Calcium Buildup

Calcium buildup in the arteries can lead to atherosclerosis, which increases the risk of heart attacks and strokes. Magnesium helps prevent calcium buildup by regulating calcium transport and deposition in the body.

How to Ensure Adequate Magnesium Intake for Heart Health

To reap the heart-healthy benefits of magnesium, it's essential to consume adequate amounts of this vital mineral. The amount of magnesium you need varies from person to person with age, gender, size and lifestyle being the most common differentiators. As a healthy adult you should have around 25 grams of magnesium stored in your body, most of this is found in your bones.

The recommended daily allowance varies between 400 milligrams to men to just over 300 milligrams for women but as get older the RDA does increase very slightly.  Unfortunately, the RDA is very general and not a great indicator for optimal levels. A simple blood test will show if you are magnesium deficient or not.

The Importance of Magnesium for a Healthy Heart

In conclusion, magnesium plays a vital role in maintaining optimal heart health. By regulating heartbeat, reducing blood pressure, decreasing inflammation, and preventing calcium buildup, this essential mineral contributes to a healthy cardiovascular system. Ensure you're getting enough magnesium through diet or supplementation to support your heart health and overall well-being.


Different Forms of Magnesium for Heart Health

There are several forms of magnesium available for supplementation, each with its unique bioavailability and elemental magnesium content. For heart health, it is recommended to include a mix of magnesium forms in your supplement regimen.

Magnesium Citrate

Magnesium citrate is a form of magnesium that your body absorbs with the most ease. This form is often recommended for heart health due to its high bioavailability.

Magnesium L-Threonate

Magnesium L-threonate is a form of magnesium that effectively promotes healthy levels of magnesium in your brain. While not specifically targeted at heart health, it is worth considering for its overall benefits to brain function.

Ensuring Adequate Magnesium Intake

The amount of magnesium a person needs varies depending on their age and sex. The Dietary Guidelines for Americans recommend the following daily intake of magnesium:

  • 400-420 mg for adult males
  • 310-320 mg for adult females
  • Increased amounts during pregnancy (consult your doctor)

However, many individuals consume magnesium at levels below these recommended amounts. To ensure adequate magnesium intake, consider incorporating magnesium-rich foods into your diet and taking magnesium supplements.

Magnesium-Rich Foods

Some examples of magnesium-rich foods include:

  • Dry roasted almonds (80 mg of magnesium per 1 ounce)
  • Boiled spinach (78 mg of magnesium per 1/2 cup)
  • Dry roasted cashews (74 mg of magnesium per 1 ounce)
  • Peanuts roasted in oil (63 mg of magnesium per 1/4 cup)
  • Cooked black beans (60 mg of magnesium per 1/2 cup)
  • Smooth peanut butter (49 mg of magnesium per 2 tablespoons)

Keep in mind that your body only absorbs between 30 and 40 percent of the magnesium in foods, so incorporating a variety of these items into your diet is essential.

Magnesium Supplements

In addition to consuming magnesium-rich foods, taking magnesium supplements can help support healthy levels of magnesium in your body. Always consult your doctor before starting a new supplement, as they may interact with certain medications. When choosing a magnesium supplement, look for one that contains both magnesium citrate and magnesium oxide for optimal heart health support.

When to Take Magnesium Supplements

The time of day you take your magnesium supplement is up to you. Some people prefer to start their day with vitamins and supplements to feel their best all day long, while others opt for a nighttime ritual. Consistency in dosage and daily supplementation is key to maintaining healthy magnesium levels.

Monitoring Your Magnesium Levels

One way to check your magnesium levels is by taking a lab test, such as a magnesium RBC blood test. You can also consult your doctor for advice on magnesium supplementation and monitoring your levels.


Magnesium's crucial influence on heart health cannot be overstated. Ensuring adequate magnesium intake through a combination of dietary sources and supplementation is essential for maintaining a healthy heart and overall well-being. By understanding the different forms of magnesium, incorporating magnesium-rich foods into your diet, and taking supplements as needed, you can support your heart health and enjoy the numerous benefits this essential mineral has to offer.



  1. Muscle function: Magnesium is crucial for proper muscle function, including the heart muscle. It helps regulate muscle contractions and promotes a healthy heartbeat.

  2. Electrolyte balance: Magnesium maintains the balance of electrolytes in the body, particularly potassium and calcium, which are essential for normal heart function and rhythm.

  3. Vascular tone: Magnesium helps to relax and dilate blood vessels, improving blood flow and reducing the strain on the heart, which is essential for maintaining healthy blood pressure levels.

  4. Blood clot prevention: Magnesium plays a role in preventing the formation of blood clots, reducing the risk of heart attacks and strokes.

  5. Energy production: Magnesium is necessary for the production of adenosine triphosphate (ATP), the primary energy source for the heart muscle to pump blood effectively.

  6. Stress response: Magnesium can help regulate the body's stress response, which is important for heart health, as chronic stress can increase the risk of heart disease.

  7. Cardiometabolic health: Magnesium has been linked to improved cardiometabolic health, including better blood sugar control and reduced risk of type 2 diabetes, both of which can decrease the risk of heart disease.

  8. Endothelial function: Magnesium supports healthy endothelial function, which is essential for maintaining the integrity and elasticity of blood vessels and reducing the risk of atherosclerosis.

  9. Heart failure: Studies have shown that magnesium supplementation can improve the prognosis of heart failure patients by reducing hospitalizations and improving overall heart function.

  10. Cardioprotective benefits: Magnesium has been shown to possess cardioprotective benefits, reducing the risk of heart disease, heart attacks, and sudden cardiac death by supporting overall heart health and function.

Magnesium Information

For everything you need to know about magnesium and magnesium supplements, check out our comprehensive information page here.

Magnesium Information


We’ve created a magnesium supplement with a combination of three types of highly absorbable magnesium at a therapeutic dose. Our magnesium comes as an easy to mix, great tasting powder to ensure optimal absorption. To learn more about our magnesium, check out the product page here.

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Ron Goedeke MD, BSc Hons MBChB, FNZCAM

Dr. Ron Goedeke, an expert in the domain of functional medicine, dedicates his practice to uncovering the root causes of health issues by focusing on nutrition and supplement-based healing and health optimisation strategies. An esteemed founding member of the New Zealand College of Appearance Medicine, Dr. Goedeke's professional journey has always been aligned with cutting-edge health concepts.

Having been actively involved with the American Academy of Anti-Aging Medicine since 1999, he brings over two decades of knowledge and experience in the field of anti-aging medicine, making him an eminent figure in this evolving realm of healthcare. Throughout his career, Dr. Goedeke has been steadfast in his commitment to leverage appropriate nutritional guidance and supplementation to encourage optimal health.

This has allowed him to ascend as one of the most trusted authorities in the arena of nutritional medicine in New Zealand. His expertise in the intricate relationship between diet, nutritional supplements, and overall health forms the backbone of his treatment approach, allowing patients to benefit from a balanced and sustainable pathway to improved wellbeing.

Disclaimer: The information provided is for educational purposes only and does not constitute medical advice. Always seek the advice of your physician or qualified healthcare provider with any questions or concerns about your health. Never disregard or delay seeking medical advice because of something you have heard or read on this website.

Last updated on the 19th of April 2023

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