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Head-to-head evidence comparison — which supplement is right for you?
Aniracetam vs Magnesium: Magnesium has the stronger overall evidence (8.5 vs 4/10); they're alternatives for reduce anxiety & stress — the best pick depends on your goals. Take the 60-second quiz for a pick tailored to your goals.
Magnesium wins 2 of 3 categories. Both are solid choices — the best pick depends on your specific goals.
Verdict
Too few graded studies
Top outcomes
Verdict
Mixed evidence
2 of 6 studies with measurable effects showed benefit.
Top outcomes
400 mg daily, the dose the cited trials support (they used a single 400 mg dose, or 400 to 600 mg a day where aniracetam was the comparison drug). Label products suggest 750-1,500 mg a day in divided doses, a dose no cited trial used.
With fat-containing food (improves absorption), Divided into 2-3 doses due to short half-life
Aniracetam powder or capsules
200-250mg elemental magnesium daily
Evening for sleep/relaxation (glycinate), Morning for energy (malate), Anytime (citrate)
Depends on goal - see notes
and 4 more not shown
1-2 weeks
30-60 minutes
1-2 hours
Per dose
1-2 weeks
1-2 weeks
1 week
Immediate
The treatment of cognitive dysfunction in dementia: a multiple treatments meta-analysis
Psychopharmacology (2018) · Meta analysis · n=44854
The pooled standardized mean difference of the treatment effects on cognitive dysfunction was 0.439 (95% confidence interval 0.374, 0.504).
Clinical efficacy of aniracetam, either as monotherapy or combined with cholinesterase inhibitors, in patients with cognitive impairment: a comparative open study
CNS neuroscience & therapeutics (2012) · Observational · n=276
In patients treated with aniracetam, all studied parameters were adequately maintained at 6 and 12 months, while emotional state was significantly improved at 3 months.
[Clinical study on a randomized, double-blind control of Shenwu gelatin capsule in treatment of mild cognitive impairment]
Zhongguo Zhong yao za zhi = Zhongguo zhongyao zazhi = China journal of Chinese materia medica (2007) · Rct · n=166
Double-blind randomised trial in 166 people with mild cognitive impairment, in which aniracetam was the active comparator for the Chinese herbal Shenwu capsule, each taken three times a day for 3 months.
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.
Magnesium has a higher evidence score (8.5/10 vs 4/10) and wins in 2 of 3 categories.
For reduce anxiety & stress, Magnesium has a higher relevance score (85 vs 65).
No documented interaction was found in the data searched. This does not establish that this exact combination is safe.
The honest tier list — proven staples vs situational vs mostly marketing. The hub the other guides feed into.
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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.