What is the recommended dosage for Magnesium?

General: 310-420 mg/day; Blood Pressure Support: 300-500 mg/day; Cardiovascular Support: 300-400 mg/day elemental magnesium

What are the side effects of Magnesium?

Potential side effects include: Diarrhea (especially magnesium oxide and citrate), Nausea, Abdominal cramping, Excessive doses may cause hypotension or cardiac depression.

What is magnesium and how may it support cardiovascular health?

Magnesium is essential for heart muscle contraction, electrical conduction, and blood vessel relaxation. Meta-analyses of prospective studies show that higher magnesium intake is associated with lower risk of cardiovascular disease, stroke, and type 2 diabetes. Magnesium deficiency is linked to arrhythmias and hypertension.

What dosage of magnesium has been studied for cardiovascular health?

Clinical trials for blood pressure reduction have used 300–500 mg of elemental magnesium per day. A meta-analysis of 34 RCTs found that magnesium supplementation at a median dose of 368 mg/day significantly reduced blood pressure. Magnesium taurate and glycinate are preferred forms for cardiovascular use.

What are the potential side effects of magnesium supplements?

Diarrhea is the most common side effect, particularly with magnesium citrate and oxide. High doses may cause hypotension, especially when combined with blood pressure medications. Individuals with kidney disease are at risk for hypermagnesemia. IV magnesium at excessive doses can cause cardiac arrest. Oral supplementation is generally safe at recommended doses.

Magnesium

mineral

Also known as: Magnesium Glycinate, Magnesium Citrate, Magnesium Taurate, Magnesium L-Threonate, Magnesium Oxide

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About

Magnesium is an essential cofactor for over 300 enzymatic reactions including those regulating vascular tone. It acts as a natural calcium channel blocker, relaxing vascular smooth muscle and reducing peripheral resistance. A 2016 meta-analysis of 34 RCTs found magnesium supplementation significantly reduced systolic blood pressure by 2.0 mmHg and diastolic by 1.78 mmHg. Approximately 50% of the US population consumes less than the EAR for magnesium.

How It Works

Essential cofactor for >300 enzymatic reactions regulating vascular tone; acts as a natural calcium channel blocker relaxing vascular smooth muscle; modulates cardiac electrical activity by stabilizing potassium and calcium channels (anti-arrhythmic); supports endothelial nitric oxide production; regulates Na+/K+-ATPase critical for cardiac membrane potential.

Evidence For Conditions

Condition	Grade	Studies	Participants
High Blood Pressure (Hypertension)	B	34	2028	View →
Cardiac Arrhythmia	B	8	500	View →
Coronary Artery Disease (CAD)	C	5	350	View →

Side Effects

Diarrhea (especially magnesium oxide and citrate)
Nausea
Abdominal cramping
Excessive doses may cause hypotension or cardiac depression

Drug & Supplement Interactions

Bisphosphonates (reduced absorption — separate by 2 hours)
Antibiotics (tetracyclines, fluoroquinolones — separate by 2-4 hours)
Diuretics (thiazides reduce, loop diuretics increase magnesium loss)
Proton pump inhibitors (long-term use may cause hypomagnesemia)

Always inform your healthcare provider about all supplements you take.

Related Ingredients

Calcium Potassium Selenium

Quick Facts

Dosage: General: 310-420 mg/day; Blood_Pressure_Support: 300-500 mg/day; Cardiovascular_Support: 300-400 mg/day elemental magnesium
Forms: capsule tablet powder liquid
Natural Sources: Pumpkin seeds, Spinach, Swiss chard, Dark chocolate, Almonds, Avocado, Black beans
Upper Limit: 350 mg/day from supplements only (no UL for food magnesium)
Best Time: With meals to reduce GI side effects; evening dosing may support sleep

Evidence Summary

High Blood Pressure (Hypertension) B

Cardiac Arrhythmia B

Coronary Artery Disease (CAD) C

FDA Disclaimer: These statements have not been evaluated by the Food and Drug Administration. The products and information on this website are not intended to diagnose, treat, cure, or prevent any disease. The evidence grades presented are based on our analysis of published peer-reviewed research and do not constitute medical advice. Always consult your healthcare provider before starting any supplement regimen.