Reviewed By
Overview
SCIENTIFIC SCORE
Possibly Effective
Based on 16 Researches
7.4
USERS' SCORE
Moderately Good
Based on 56 Reviews
7.3
Supplement Facts
Serving Size: 1 Veg Capsule
Amount Per Serving
%DV
Magnesium (elemental) (from Magnesium Oxide, Magnesium Citrate and Magnesium Aspartate)
400 mg
95%
Top Medical Research Studies
7
We examined how magnesium supplements might influence heart failure and serious heart-related issues in diabetic patients.
In a study involving over 94,000 veterans, we found that those taking magnesium supplements experienced a lower risk of heart failure compared to nonusers. Specifically, 8.0% of supplement users developed heart failure, versus 9.7% of nonusers.
Furthermore, magnesium intake was linked to a reduced chance of major adverse cardiac events. However, it’s important to note that these findings need further investigation through randomized controlled trials.
In a study involving over 94,000 veterans, we found that those taking magnesium supplements experienced a lower risk of heart failure compared to nonusers. Specifically, 8.0% of supplement users developed heart failure, versus 9.7% of nonusers.
Furthermore, magnesium intake was linked to a reduced chance of major adverse cardiac events. However, it’s important to note that these findings need further investigation through randomized controlled trials.
Read More
9
We explored how magnesium supplementation might influence mortality rates in patients with heart failure and preserved ejection fraction (HFpEF). The study involved nearly 2,000 patients, with careful matching to ensure a fair comparison between those receiving magnesium and those who weren’t.
Interestingly, we found that magnesium intake was linked to a significant reduction in 28-day mortality rates. This effect was most notable in older adults, women, and patients with high blood pressure. Despite these positive findings, magnesium treatment did lead to longer hospital and ICU stays.
Overall, magnesium shows promise as a supportive treatment for HFpEF, but further investigation is necessary to better understand its benefits and implications.
Interestingly, we found that magnesium intake was linked to a significant reduction in 28-day mortality rates. This effect was most notable in older adults, women, and patients with high blood pressure. Despite these positive findings, magnesium treatment did lead to longer hospital and ICU stays.
Overall, magnesium shows promise as a supportive treatment for HFpEF, but further investigation is necessary to better understand its benefits and implications.
Read More
8
Magnesium levels and heart disease mortality
We examined the link between serum magnesium levels and the risk of death from heart failure, coronary heart disease, and stroke in patients with chronic kidney disease who don’t require dialysis. Over a decade, we followed 1,271 patients, noting that those with higher magnesium levels experienced significantly lower mortality rates from these conditions.
This suggests that maintaining adequate magnesium levels may help improve health outcomes for individuals with advanced kidney issues and an increased risk of cardiovascular problems.
This suggests that maintaining adequate magnesium levels may help improve health outcomes for individuals with advanced kidney issues and an increased risk of cardiovascular problems.
Read More
Most Useful Reviews
7.5
Stabilised heart
546 people found this helpful
I consider these capsules essential for managing my atrial fibrillation because I need magnesium. Having taken this complex for two years, I've noticed my heart works more steadily and no longer goes out of rhythm with the slightest excitement. The capsules are small and easy to take, although my wife prefers to empty the powder into her food. The packaging confirms this is acceptable. I highly recommend this product!
Read More
9
Improves sleep quality
133 people found this helpful
Magnesium is a key trace element that aids heart rate, blood pressure regulation, and improves sleep quality. I find this product offers great value with long-lasting supply. I began taking it to enhance sleep quality and reduce muscle cramps, which seems to be effective. It’s best to consult a doctor before determining needs.
Read More
0
No effect noted
48 people found this helpful
We, four people, tried it and it’s truly disappointing. I usually favour NOW Foods products, having 12 open bottles, but this one is worthless. It had no effect on my heart rate or relaxation. For an effective magnesium supplement, I recommend UltraMag from Source Naturals. This is an honest review shared by all of us in the house.
Read More
Medical Researches
SCIENTIFIC SCORE
Possibly Effective
Based on 16 Researches
7.4
- All Researches
9
We explored how magnesium supplementation might influence mortality rates in patients with heart failure and preserved ejection fraction (HFpEF). The study involved nearly 2,000 patients, with careful matching to ensure a fair comparison between those receiving magnesium and those who weren’t.
Interestingly, we found that magnesium intake was linked to a significant reduction in 28-day mortality rates. This effect was most notable in older adults, women, and patients with high blood pressure. Despite these positive findings, magnesium treatment did lead to longer hospital and ICU stays.
Overall, magnesium shows promise as a supportive treatment for HFpEF, but further investigation is necessary to better understand its benefits and implications.
Interestingly, we found that magnesium intake was linked to a significant reduction in 28-day mortality rates. This effect was most notable in older adults, women, and patients with high blood pressure. Despite these positive findings, magnesium treatment did lead to longer hospital and ICU stays.
Overall, magnesium shows promise as a supportive treatment for HFpEF, but further investigation is necessary to better understand its benefits and implications.
Read More
8
Magnesium levels and heart disease mortality
We examined the link between serum magnesium levels and the risk of death from heart failure, coronary heart disease, and stroke in patients with chronic kidney disease who don’t require dialysis. Over a decade, we followed 1,271 patients, noting that those with higher magnesium levels experienced significantly lower mortality rates from these conditions.
This suggests that maintaining adequate magnesium levels may help improve health outcomes for individuals with advanced kidney issues and an increased risk of cardiovascular problems.
This suggests that maintaining adequate magnesium levels may help improve health outcomes for individuals with advanced kidney issues and an increased risk of cardiovascular problems.
Read More
8
Magnesium intake impacts heart disease risk
We explored the link between magnesium intake and heart disease risk in young adults, using a comprehensive study of U.S. adults aged 20 to 34. This cross-sectional research analyzed data from the National Health and Nutrition Examination Survey, examining dietary habits and various cardiovascular factors.
Our findings suggest that higher magnesium intake is associated with a lower risk of future cardiovascular issues and non-HDL cholesterol problems. This suggests that including magnesium-rich foods in our diets could promote heart health early in life.
Our findings suggest that higher magnesium intake is associated with a lower risk of future cardiovascular issues and non-HDL cholesterol problems. This suggests that including magnesium-rich foods in our diets could promote heart health early in life.
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8
We analyzed several clinical trials to examine how magnesium and potassium affect systolic blood pressure (SBP) in healthy individuals. Our findings showed that magnesium significantly reduced SBP, especially at lower doses (up to 360 mg/day) and longer treatment periods of over three months. Potassium also played a role but was effective at higher doses and shorter durations.
However, both supplements showed promise in lowering SBP but did not seem to drastically change heart disease risk directly. Further studies will help confirm our results and refine dosage recommendations for better health outcomes.
However, both supplements showed promise in lowering SBP but did not seem to drastically change heart disease risk directly. Further studies will help confirm our results and refine dosage recommendations for better health outcomes.
Read More
8
We explored how the serum calcium-magnesium ratio impacts outcomes in patients with acute coronary syndrome (ACS) by analyzing data from 1,775 individuals who underwent coronary procedures over five years.
By categorizing patients based on their calcium-magnesium levels at admission, we discovered that a higher calcium-to-magnesium ratio correlated with worse outcomes.
Our findings suggest that monitoring this ratio could help predict the prognosis for those dealing with ACS, emphasizing the importance of maintaining a balanced mineral intake for heart health.
By categorizing patients based on their calcium-magnesium levels at admission, we discovered that a higher calcium-to-magnesium ratio correlated with worse outcomes.
Our findings suggest that monitoring this ratio could help predict the prognosis for those dealing with ACS, emphasizing the importance of maintaining a balanced mineral intake for heart health.
Read More
User Reviews
USERS' SCORE
Moderately Good
Based on 56 Reviews
7.3
- All Reviews
- Positive Reviews
- Negative Reviews
7.5
Stabilised heart
546 people found this helpful
I consider these capsules essential for managing my atrial fibrillation because I need magnesium. Having taken this complex for two years, I've noticed my heart works more steadily and no longer goes out of rhythm with the slightest excitement. The capsules are small and easy to take, although my wife prefers to empty the powder into her food. The packaging confirms this is acceptable. I highly recommend this product!
Read More
9
Improves sleep quality
133 people found this helpful
Magnesium is a key trace element that aids heart rate, blood pressure regulation, and improves sleep quality. I find this product offers great value with long-lasting supply. I began taking it to enhance sleep quality and reduce muscle cramps, which seems to be effective. It’s best to consult a doctor before determining needs.
Read More
0
No effect noted
48 people found this helpful
We, four people, tried it and it’s truly disappointing. I usually favour NOW Foods products, having 12 open bottles, but this one is worthless. It had no effect on my heart rate or relaxation. For an effective magnesium supplement, I recommend UltraMag from Source Naturals. This is an honest review shared by all of us in the house.
Read More
9
Reduces anxiety
10 people found this helpful
I found magnesium to be vital for muscle relaxation and overall well-being, which has significantly reduced my anxiety levels. After noticing improvements in my sleep and calmness over two weeks, I've decided to keep taking it. I believe it’s crucial for optimal vitamin absorption and has positively affected my digestive health.
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0
Negative reaction experienced
8 people found this helpful
After taking this blend, I developed pericarditis. I suspect the magnesium aspartate is the cause, as it’s known to be an excitatory neurotransmitter. I’ve had a bad reaction, raising my concern about its connection to heart disease. This isn't an isolated issue, and I hope this review aids others affected.
Read More
Frequently Asked Questions
9
Reduces anxiety
10 people found this helpful
I found magnesium to be vital for muscle relaxation and overall well-being, which has significantly reduced my anxiety levels. After noticing improvements in my sleep and calmness over two weeks, I've decided to keep taking it. I believe it’s crucial for optimal vitamin absorption and has positively affected my digestive health.
7.5
Stable heart rhythm
256 people found this helpful
I've been using this magnesium complex for two years and found my heart to be more stable, without rhythm issues during excitement. The capsules are small and convenient, though my wife prefers to mix the powder with food. The price on this site is great compared to pharmacies, and the dosage works well for me — just one capsule at night.
0
Adverse effects noted
After taking just one capsule, I experienced arrhythmia despite having a healthy heart. My intracranial pressure increased as well. This product is dreadful and has had adverse effects.
7.5
Stabilised heart
546 people found this helpful
I consider these capsules essential for managing my atrial fibrillation because I need magnesium. Having taken this complex for two years, I've noticed my heart works more steadily and no longer goes out of rhythm with the slightest excitement. The capsules are small and easy to take, although my wife prefers to empty the powder into her food. The packaging confirms this is acceptable. I highly recommend this product!
0
Worsened condition observed
This magnesium product is a waste of money; it has caused stomachaches, heart palpitations, and disrupted my sleep. Other magnesium supplements have been effective in relaxing my muscles and aiding sleep, unlike this one. I’m very disappointed with the results, as it seems counterproductive for anyone dealing with heart disease.
9
Supports heart health
1 people found this helpful
NOW Foods Magnesium Capsules are my go-to for heart, muscle, and nervous system health. Each capsule contains 400 mg of magnesium, which is vital for numerous biological processes, including heart health. The packaging has 180 capsules, sufficient for regular use to maintain health.
9
Improves sleep quality
133 people found this helpful
Magnesium is a key trace element that aids heart rate, blood pressure regulation, and improves sleep quality. I find this product offers great value with long-lasting supply. I began taking it to enhance sleep quality and reduce muscle cramps, which seems to be effective. It’s best to consult a doctor before determining needs.
9
Supports overall health
1 people found this helpful
Magnesium activates and supports the heart muscle and regulates various bodily functions. It's essential for protein assimilation, skeletal formation, muscle function, cell regeneration, and blood clotting. When dieting, a magnesium deficiency can occur, but this supplement has worked perfectly for me. I've noticed reduced irritation since I started taking magnesium.
7
We examined how magnesium supplements might influence heart failure and serious heart-related issues in diabetic patients.
In a study involving over 94,000 veterans, we found that those taking magnesium supplements experienced a lower risk of heart failure compared to nonusers. Specifically, 8.0% of supplement users developed heart failure, versus 9.7% of nonusers.
Furthermore, magnesium intake was linked to a reduced chance of major adverse cardiac events. However, it’s important to note that these findings need further investigation through randomized controlled trials.
In a study involving over 94,000 veterans, we found that those taking magnesium supplements experienced a lower risk of heart failure compared to nonusers. Specifically, 8.0% of supplement users developed heart failure, versus 9.7% of nonusers.
Furthermore, magnesium intake was linked to a reduced chance of major adverse cardiac events. However, it’s important to note that these findings need further investigation through randomized controlled trials.
8
Magnesium levels and heart disease mortality
We examined the link between serum magnesium levels and the risk of death from heart failure, coronary heart disease, and stroke in patients with chronic kidney disease who don’t require dialysis. Over a decade, we followed 1,271 patients, noting that those with higher magnesium levels experienced significantly lower mortality rates from these conditions.
This suggests that maintaining adequate magnesium levels may help improve health outcomes for individuals with advanced kidney issues and an increased risk of cardiovascular problems.
This suggests that maintaining adequate magnesium levels may help improve health outcomes for individuals with advanced kidney issues and an increased risk of cardiovascular problems.
7
We investigated the effect of magnesium and calcium on blood sugar levels in 11,934 patients with coronary artery disease. Our findings indicated that higher serum magnesium levels and a favorable magnesium to calcium ratio were associated with lower abnormal HbA1c levels, which reflect better blood sugar management. In contrast, calcium showed no significant association with HbA1c levels. Importantly, we found no evidence that inflammation played a role in this relationship. Overall, magnesium might be beneficial for maintaining healthy blood sugar levels in those with heart disease.
9
We explored how magnesium supplementation might influence mortality rates in patients with heart failure and preserved ejection fraction (HFpEF). The study involved nearly 2,000 patients, with careful matching to ensure a fair comparison between those receiving magnesium and those who weren’t.
Interestingly, we found that magnesium intake was linked to a significant reduction in 28-day mortality rates. This effect was most notable in older adults, women, and patients with high blood pressure. Despite these positive findings, magnesium treatment did lead to longer hospital and ICU stays.
Overall, magnesium shows promise as a supportive treatment for HFpEF, but further investigation is necessary to better understand its benefits and implications.
Interestingly, we found that magnesium intake was linked to a significant reduction in 28-day mortality rates. This effect was most notable in older adults, women, and patients with high blood pressure. Despite these positive findings, magnesium treatment did lead to longer hospital and ICU stays.
Overall, magnesium shows promise as a supportive treatment for HFpEF, but further investigation is necessary to better understand its benefits and implications.
References
- Cheng Y, Zullo AR, Yin Y, Shao Y, Liu S, et al. Nonprescription Magnesium Supplement Use and Risk of Heart Failure in Patients With Diabetes: A Target Trial Emulation. J Am Heart Assoc. 2025;14:e038870. 10.1161/JAHA.124.038870
- Moyano-Peregrin C, Rodelo-Haad C, Martín-Malo A, Muñoz-Castañeda JR, Ojeda R, et al. Upper normal serum magnesium is associated with a reduction in incident death from fatal heart failure, coronary heart disease and stroke in non-dialysis patients with CKD stages 4 and 5. Clin Kidney J. 2025;18:sfae390. 10.1093/ckj/sfae390
- Dong H, Lu N, Wang J, Hu P. Serum magnesium, not calcium, is inversely associated with abnormal HbA1c concentrations in adults with coronary artery disease. Asia Pac J Clin Nutr. 2025;34:104. 10.6133/apjcn.202502_34(1).0010
- Song L, Ying J, Li M, Ying L, Zhao C. Propensity score matched cohort study on magnesium supplementation and mortality in critically ill patients with HFpEF. Sci Rep. 2025;15:1944. 10.1038/s41598-025-85931-1
- Sun L, Du J. Magnesium status, serum vitamin D concentration and mortality among congestive heart failure patients: a cohort study from NHANES 2007-2018. Magnes Res. 2024;37:61. 10.1684/mrh.2024.0528
- Song Q, Song L, Liu H, Tan H, Yang B, et al. Association of magnesium intake with predicted atherosclerotic lesions and cardiovascular risk in young adults based on PDAY score: a cross-sectional study. BMC Public Health. 2024;24:3232. 10.1186/s12889-024-20785-2
- Behers BJ, Behers BM, Stephenson-Moe CA, Vargas IA, Meng Z, et al. Magnesium and Potassium Supplementation for Systolic Blood Pressure Reduction in the General Normotensive Population: A Systematic Review and Subgroup Meta-Analysis for Optimal Dosage and Treatment Length. Nutrients. 2024;16. 10.3390/nu16213617
- Jiang Y, Luo B, Chen Y, Lu W, Peng Y, et al. Serum calcium-magnesium ratio at admission predicts adverse outcomes in patients with acute coronary syndrome. PLoS One. 2024;19:e0313352. 10.1371/journal.pone.0313352
- Wyss C, Gündling PW, Kostev K. Real world effectiveness of Hawthorn special extract WS 1442 in a retrospective cohort study from Germany. Sci Rep. 2024;14:22986. 10.1038/s41598-024-74325-4
- Seguchi M, Aytekin A, Xhepa E, Haude M, Wlodarczak A, et al. Vascular response following implantation of the third-generation drug-eluting resorbable coronary magnesium scaffold: an intravascular imaging analysis of the BIOMAG-I first-in-human study. EuroIntervention. 2024;20:e1173. 10.4244/EIJ-D-24-00055
- Zhang J, Chen Z, Rao L, He Y. Coronary bioresorbable metallic stents: Advancements and future perspectives. J Cardiol. 2025;85:69. 10.1016/j.jjcc.2024.08.003
- Copp KL, Steffen LM, Yi SY, Lutsey PL, Rebholz CM, et al. Magnesium-rich diet score is inversely associated with incident cardiovascular disease: the Atherosclerosis Risk in Communities (ARIC) study. Eur J Prev Cardiol. 2025;32:386. 10.1093/eurjpc/zwae251
- Zhuang J, Zhang Q, Wang H, Su PH, Chen PY. Association between short-term changes in serum magnesium and in-hospital mortality following acute myocardial infarction: a cohort study based on the MIMIC database. Magnes Res. 2024;37:45. 10.1684/mrh.2024.0517
- Fruh V, Babalola T, Sears C, Wellenius GA, Webster TF, et al. Dietary Minerals and Incident Cardiovascular Outcomes among Never-Smokers in a Danish Case-Cohort Study. Int J Environ Res Public Health. 2024;21. 10.3390/ijerph21070932
- Tao J, Wang J, Peng H, Yuan Y, Lai H, et al. Association between serum phosphate, magnesium, calcium and aortic valve sclerosis: a propensity score-matched case-control study. Acta Cardiol. 2024;79:522. 10.1080/00015385.2024.2379682
- Zhang J, Sun D, Guo Y, Tong J, Liu Q, et al. Targeted delivery of black phosphorus nanosheets by ROS responsive complex hydrogel based on angiogenesis and antioxidant promotes myocardial infarction repair. J Nanobiotechnology. 2024;22:433. 10.1186/s12951-024-02685-0
