The Study
Magnesium Deficiency Causes a Reversible, Metabolic, Diastolic Cardiomyopathy
This study was done on mice, not people. The researchers split the mice into two groups: one got normal food and the other got food without enough magnesium. They found that the mice without magnesium got heart problems, and giving them magnesium again fixed the problems. So in mice, lack of magnesium can cause heart issues, but we can't be sure it works the same way in people.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
Mice fed a diet very low in magnesium for 6 weeks got heart problems, especially trouble relaxing properly between beats. This is like a heart failure with preserved pumping function. When they got magnesium back, their hearts recovered. This suggests magnesium is important for heart health.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 518 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. The gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1For humans, this suggests that having enough magnesium might help prevent or treat a type of heart failure where the heart doesn't relax well, but more research is needed.
- 2Mice on low magnesium had worse heart relaxation scores (21.1 vs 15.4 on a measure), lower energy (ATP) in heart cells, and more oxidative stress.
- 3After magnesium repletion, these went back to normal.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease
Year
2021
Authors
Man Liu, Hong Liu, Feng Feng, A. Xie, G. Kang, Yang Zhao, Cody R. Hou, Xiaoxu Zhou, S. Dudley
Related Content
Claims (7)
Not getting enough magnesium causes the body to age faster by causing long-term inflammation, damaging the tiny power plants inside cells, shortening the protective caps on DNA, upsetting the natural balance of gut bacteria, and causing damage to the genetic code.
When mice don't get enough magnesium, the energy-producing parts of their cells (mitochondria) get damaged. This damage causes the heart to not relax properly because it doesn't have enough energy.
Mice that eat a diet with very little magnesium for 6 weeks develop a heart problem where the heart muscle can't relax properly after a beat. This shows up as an abnormal reading on an ultrasound. When they are switched back to a normal diet with magnesium for 6 more weeks, their heart function goes back to normal.
In mice, not getting enough magnesium causes a heart problem where the heart can't relax properly. Giving them magnesium again completely fixes this: their hearts relax normally, cells get their energy back, and a specific heart protein is restored to its healthy state.
When mice don't get enough magnesium, their hearts don't pump as well. Giving them a special antioxidant that works inside the mitochondria (the cell's energy generators) made their heart function better, increased energy production, and reduced a harmful chemical change on a heart protein. This shows that stress in mitochondria causes the heart damage seen with low magnesium.
Mice that don't get enough magnesium have a heart muscle protein that gets chemically damaged, and this damage is linked to the heart not relaxing well.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.