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Head-to-head evidence comparison — which supplement is right for you?
Epicatechin and Magnesium are closely matched across evidence, studies, and safety.
Verdict
Probably helps
10 of 17 studies with measurable effects showed benefit.
Top outcomes
Verdict
Likely helps
13 of 17 studies with measurable effects showed benefit.
Top outcomes
Shared outcomes (2)
Outcomes where both Epicatechin and Magnesium have evidence — compare verdict strength side-by-side.
100-200mg daily
With meals, Pre-workout or morning
Pure (-)-Epicatechin extract
200-350mg elemental magnesium daily
Evening for sleep/relaxation (glycinate), Morning for energy (malate), Anytime (citrate)
Depends on goal - see notes
2-4 weeks
4 weeks
N/A
4-8 weeks
1-2 weeks
1-2 weeks
1 week
Immediate
Dietary flavonoid for preventing colorectal neoplasms
The Cochrane database of systematic reviews (2012) · Meta analysis · n=390769
A statistically significant reduced risk of CRC was found with high intake of epicatechin.
Effects of chocolate, cocoa, and flavan-3-ols on cardiovascular health: a systematic review and meta-analysis of randomized trials
The American journal of clinical nutrition (2012) · Meta analysis · n=1297
Insulin resistance (HOMA-IR: -0.67; 95% CI: -0.98, -0.36) was improved by chocolate or cocoa due to significant reductions in serum insulin.
Impact of flavan-3-ols on blood pressure and endothelial function in diverse populations: a systematic review and meta-analysis of randomized controlled trials
European journal of preventive cardiology (2025) · Meta analysis · n=5205
Flavan-3-ol interventions included epicatechin, epigallocatechin-gallate, cocoa products, tea, grape extract, and apples delivering 586 mg (95% CI 510, 662) total flavan-3-ols.
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
Hypertension (2025) · 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.
Based on meta-analysis showing FMD improvements with flavan-3-ol interventions. Most studies used cocoa products rather than pure epicatechin. Conservative estimate given mixed study designs and populations.
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.
AI-estimated from published studies. Interpret as directional guidance.
Both Epicatechin and Magnesium are closely matched — the best choice depends on your specific health goals.
For support heart health, Magnesium has a higher relevance score (75 vs 58).
No known interactions between Epicatechin and Magnesium have been documented in our database. However, always consult a healthcare provider before combining supplements.