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Head-to-head evidence comparison — which supplement is right for you?
Magnesium wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Probably helps
9 of 13 studies with measurable effects showed benefit.
Top outcomes
Verdict
Mostly mechanism / observational
2 of 2 studies with measurable effects showed benefit.
Top outcomes
200-350mg elemental magnesium daily
Evening for sleep/relaxation (glycinate), Morning for energy (malate), Anytime (citrate)
Depends on goal - see notes
200-400mg (standardized to 2% honokiol and magnolol)
Evening for sleep, As needed for anxiety
Standardized extract (honokiol/magnolol content specified)
1-2 weeks
1-2 weeks
1 week
Immediate
30-60 minutes
30-60 minutes
1-2 weeks
Magnesium supplementation in pregnancy
The Cochrane database of systematic reviews (2014) · Meta analysis · n=9090
Women receiving magnesium were significantly less likely to require hospitalisation during pregnancy (RR 0.65, 95% CI 0.48 to 0.86; three trials, 1158 women).Of the 10 trials included in the review, only two were judged to be of high quality overall.
Magnesium Supplementation and Blood Pressure: A Systematic Review and Meta-Analysis
Nutrients (2024) · Meta analysis · n=2709
38 RCTs with 2709 participants analyzed
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) · Meta analysis
Both supplements demonstrated greater reductions in SBP for the general population at lower dosages and longer treatment durations.
The Cardioprotective Effect of Magnolia officinalis and Its Major Bioactive Chemical Constituents
International journal of molecular sciences (2025) · Systematic review
In addition, there is no clinical evidence for the absorption and bioavailability of M. officinalis extracts and their main bioactive compounds in humans.
Depression and Its Phytopharmacotherapy-A Narrative Review
International journal of molecular sciences (2023) · Systematic review
Moreover, it is noteworthy that the anti-inflammatory effect is also important to the antidepressant activity of the plants mentioned above in light of the hypothesis that immunological disorders of the CNS are a significant pathogenetic factor of depression.
Effectiveness of Magnolol, a Lignan from Magnolia Bark, in Diabetes, Its Complications and Comorbidities-A Review
International journal of molecular sciences (2021) · Systematic review
Magnolol, a polyphenolic compound found in magnolia bark, is known for its health-promoting activities and multidirectional beneficial effects on the body.
Based on meta-analysis of 38 RCTs with 2709 participants showing -7.68 mmHg reduction in hypertensive individuals. Effects are greatest in those with hypomagnesemia. Limited evidence in normotensive populations.
Based on single RCT (n=40) showing cortisol reduction and mood improvement with magnolia extract. Limited human data on bioavailability. Effectiveness conservative due to small study size and lack of replication. Drowsiness may occur at higher doses.
AI-estimated from published studies. Interpret as directional guidance.
Magnesium has a higher evidence score (8.5/10 vs 7.5/10) and wins in 2 of 3 categories.
For improve deep sleep quality, Magnesium has a higher relevance score (90 vs 58).
No known interactions between Magnesium and Magnolia Bark have been documented in our database. However, always consult a healthcare provider before combining supplements.