Magnesium for Heart, Hormones & Muscle: What the Research Shows for Midlife Health
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Magnesium for Heart, Hormones & Muscle: What the Research Shows for Midlife Health
By Bosmora Staff · Reviewed for accuracy using peer-reviewed and institutional health sources
Quick answer: Higher magnesium intake is linked to lower cardiovascular risk and modest reductions in blood pressure, particularly with magnesium taurate. Research also links magnesium supplementation to increased free and total testosterone, likely by lowering sex hormone-binding globulin (SHBG). These effects are most studied in adults aged 45–59, though the mechanisms apply to both men and women.
This article centers on the research most relevant to adults in the 45–59 range cardiovascular risk, testosterone, and body composition though the underlying mechanisms apply just as much to women.
Does magnesium reduce cardiovascular risk?
A study published in the American Journal of the Medical Sciences (Yang et al., 2024) looked at dietary magnesium intake and 10-year risk of a first major atherosclerotic cardiovascular event. The finding: higher magnesium intake was inversely associated with that risk, particularly in people whose baseline cardiovascular risk was already at or above 7.5%, which is exactly the territory many people in their late forties and fifties are in or approaching.
Longer-term data reinforces this. A study published in the European Journal of Preventive Cardiology followed participants for over 30 years and found that a magnesium-rich dietary pattern with whole grains, nuts, legumes, coffee, and tea was independently associated with meaningfully reduced cardiovascular disease risk. That's decades of follow-up, not a short-term trial.
Can magnesium lower blood pressure?
Magnesium taurate has research showing reductions of 8–11 mmHg in systolic blood pressure and roughly 4 mmHg in diastolic. There's an important catch here. Anyone already on a diuretic for hypertension is having their magnesium actively depleted by that same medication. It's entirely possible to be managing blood pressure with medication while unknowingly worsening an underlying mineral deficiency at the same time.
Does magnesium increase testosterone?
A 2011 study by Cinar and colleagues, published in Biological Trace Element Research, found that magnesium supplementation increased both free and total testosterone in men, including sedentary men and athletes alike, with greater increases among those exercising regularly. There's a plausible mechanism behind this, not just a statistical association. Magnesium appears to reduce levels of sex hormone-binding globulin (SHBG), a protein that binds to testosterone and renders it biologically inactive. As men age, SHBG naturally rises, which means total testosterone can look completely normal on a blood test while free, usable testosterone is actually quite low. Magnesium may help keep more testosterone in free circulation, and it also supports the Leydig cells in the testes, which are responsible for testosterone production itself. In other words, it may be working on both production and availability at once.
Does magnesium affect body composition?
Research shows that increasing magnesium intake by just 10 mg per 1,000 calories per day is associated with a measurable reduction in BMI and waist circumference in men. None of this is dramatic on its own. However, it's foundational support that compounds over time.
What test should I ask for to check magnesium status?
If you're on blood pressure medication or any cardiac medication, don't stop or adjust anything without talking to your doctor, but it is worth asking about your magnesium status specifically. Ask for an RBC magnesium test, not just serum. RBC testing reflects magnesium in the cells and tissues, rather than the small fraction circulating in blood serum, and gives a far more accurate picture of actual status.
Next in this series: the connection between magnesium, sleep, stress, and brain function, including some genuinely surprising clinical data on sleep onset.
Frequently Asked Questions
Does magnesium lower blood pressure?
Magnesium taurate specifically has been shown to reduce systolic blood pressure by 8–11 mmHg and diastolic pressure by about 4 mmHg in research studies.
Can magnesium boost testosterone naturally?
Research shows magnesium supplementation increases both free and total testosterone, likely by lowering sex hormone-binding globulin (SHBG), which otherwise keeps testosterone biologically inactive.
What blood test should I ask for to check magnesium status?
Ask your doctor for an RBC (red blood cell) magnesium test rather than a standard serum test, since RBC testing better reflects magnesium stored in cells and tissue.
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Sources
Nielsen, F.H. (2024). The Role of Dietary Magnesium in Cardiovascular Disease. Nutrients, 16(23), 4223. https://pmc.ncbi.nlm.nih.gov/articles/PMC11644202/
Yang et al. (2024). Association between dietary magnesium and 10-year risk of a first hard atherosclerotic cardiovascular disease event. American Journal of the Medical Sciences, 368, 355–360. https://www.sciencedirect.com/science/article/pii/S0002962924012618
Magnesium-rich diet score is inversely associated with risk of cardiovascular disease. European Journal of Preventive Cardiology, 2025. https://pubmed.ncbi.nlm.nih.gov/39096274/
Does Magnesium Increase Testosterone? Hims, 2025. https://www.hims.com/blog/magnesium-testosterone
Cinar, V. et al. (2011). Effects of magnesium supplementation on testosterone levels of athletes and sedentary subjects at rest and after exhaustion. Biol Trace Elem Res, 140, 18–23. https://pubmed.ncbi.nlm.nih.gov/20352370/
Food for Thought — Magnesium and Men's Health. GatorCare, 2024. https://gatorcare.org/2024/06/17/food-for-thought-magnesium-and-mens-health/
This article is for educational purposes and is not a substitute for medical advice. If you take blood pressure or cardiac medication, talk to your doctor before making any supplement changes.