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Head-to-head evidence comparison — which supplement is right for you?
Magnesium vs Red Clover: Magnesium has the stronger overall evidence (8.5 vs 4.5/10); they're alternatives for bone health — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Magnesium wins 3 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Mixed evidence
2 of 6 studies with measurable effects showed benefit.
Top outcomes
Verdict
Too few graded studies
1 of 2 studies with measurable effects showed benefit.
Top outcomes
200-250mg elemental magnesium daily
Evening for sleep/relaxation (glycinate), Morning for energy (malate), Anytime (citrate)
Depends on goal - see notes
40-80mg isoflavones daily
With meals, Consistent daily timing
Standardized extract (40mg isoflavones per dose)
and 4 more not shown
1-2 weeks
1-2 weeks
1 week
Immediate
4-12 weeks
6-12 months
8-12 weeks
Ongoing
Magnesium supplementation in pregnancy
The Cochrane database of systematic reviews (2014) · Meta analysis · n=9090
Ten trials involving 9090 women and their babies. Only two were judged to be of high quality overall.
Magnesium Supplementation and Blood Pressure: A Systematic Review and Meta-Analysis
Hypertension (2025) · Meta analysis · n=2709
38 RCTs with 2709 participants, median 365 mg elemental magnesium for a median 12 weeks. Systolic BP -2.81 mmHg (95% CI -4.32 to -1.29), diastolic -2.05 mmHg versus placebo.
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.
Role of Phytoestrogen-Rich Bioactive Substances (Linum usitatissimum L., Glycine max L., Trifolium pratense L.) in Cardiovascular Disease Prevention in Postmenopausal Women: A Systematic Review and Meta-Analysis
Nutrients (2022) · Meta analysis
Meta-analysis of flaxseed, soy and red clover trials in postmenopausal women. Each plant was pooled separately.
Evaluation of Clinical Meaningfulness of Red Clover (Trifolium pratense L.) Extract to Relieve Hot Flushes and Menopausal Symptoms in Peri- and Post-Menopausal Women: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
Nutrients (2021) · Meta analysis
Meta-analysis of eight randomised placebo-controlled trials (ten comparisons) of red clover isoflavones in peri- and postmenopausal women.
Isoflavone Supplements for Menopausal Women: A Systematic Review
Nutrients (2019) · Systematic review
We found that isoflavones reduce hot flashes even accounting for placebo effect, attenuate lumbar spine bone mineral density (BMD) loss, show beneficial effects on systolic blood pressure during early menopause, and improve glycemic control in vitro.
The trials behind this curve used 40 to 82 mg of isoflavones a day. A meta-analysis of five trials at that range found a marginal fall of 1.5 hot flushes a day (PMID 17239573). A second meta-analysis of eight trials found a larger effect in the subgroup taking 80 mg or more (PMID 33920485), and a meta-analysis of Promensil at 80 mg found 3.6 fewer hot flushes a day (PMID 28160855). A 6-month RCT at 80 mg improved Menopause Rating Scale scores (PMID 39254422). No cited trial reports 40 mg on its own or tested more than about 80 mg, so no threshold, optimal dose or safety ceiling is plotted.
AI-estimated from published studies. Interpret as directional guidance.
Magnesium has a higher evidence score (8.5/10 vs 4.5/10) and wins in 3 of 3 categories.
For bone health, Magnesium has a higher relevance score (85 vs 60).
No documented interaction was found in the data searched. This does not establish that this exact combination is safe.
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The right pick depends on your goals. Answer a few quick questions for a personalised recommendation — or dig into the full evidence on each.