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Head-to-head evidence comparison — which supplement is right for you?
Magnesium wins 3 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Mostly mechanism / observational
1 of 1 studies with measurable effects showed benefit.
Top outcomes
Verdict
Likely helps
13 of 17 studies with measurable effects showed benefit.
Top outcomes
1000-6000mg (1-6g) cinnamon powder daily, or 250-500mg standardized extract; prefer Ceylon for regular use
with-meals
Ceylon cinnamon powder or standardized aqueous extract
200-350mg elemental magnesium daily
Evening for sleep/relaxation (glycinate), Morning for energy (malate), Anytime (citrate)
Depends on goal - see notes
4-12 weeks
4-12 weeks
8-12 weeks
8-12 weeks
1-2 weeks
1-2 weeks
1 week
Immediate
The effect of cinnamon supplementation on glycemic control in patients with type 2 diabetes mellitus: An updated systematic review and dose-response meta-analysis of randomized controlled trials
Phytotherapy research : PTR (2024) · Meta analysis
Significant reduction in fasting blood sugar (SMD −1.32; 95% CI −1.77 to −0.87; p<0.001)
Effects of cinnamon supplementation on metabolic biomarkers in individuals with type 2 diabetes
Nutrition reviews (2025) · Meta analysis
Improvements in glycemic and lipid biomarkers reported
Efficacy and safety of cinnamon in type 2 diabetes mellitus and pre-diabetes patients: A meta-analysis and meta-regression
Diabetes research and clinical practice (2019) · Meta analysis
Significant reduction in fasting blood glucose
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 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.
Magnesium has a higher evidence score (8.5/10 vs 6.8/10) and wins in 3 of 3 categories.
For pms relief, Magnesium has a higher relevance score (88 vs 48).
No known interactions between Cinnamon and Magnesium have been documented in our database. However, always consult a healthcare provider before combining supplements.