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Published in: European Journal of Nutrition 1/2020

01-02-2020 | Migraine | Original Contribution

Magnesium and health outcomes: an umbrella review of systematic reviews and meta-analyses of observational and intervention studies

Authors: Nicola Veronese, Jacopo Demurtas, Gabriella Pesolillo, Stefano Celotto, Tommaso Barnini, Giovanni Calusi, Maria Gabriella Caruso, Maria Notarnicola, Rosa Reddavide, Brendon Stubbs, Marco Solmi, Stefania Maggi, Alberto Vaona, Joseph Firth, Lee Smith, Ai Koyanagi, Ligia Dominguez, Mario Barbagallo

Published in: European Journal of Nutrition | Issue 1/2020

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Abstract

Purpose

To map and grade all health outcomes associated with magnesium (Mg) intake and supplementation using an umbrella review.

Methods

Umbrella review of systematic reviews with meta-analyses of observational studies and randomized controlled trials (RCTs) using placebo/no intervention as control group. We assessed meta-analyses of observational studies based on random-effect summary effect sizes and their p values, 95% prediction intervals, heterogeneity, small-study effects and excess significance. For meta-analyses of RCTs, outcomes with a random-effect p value < 0.005 and a high-GRADE assessment were classified as strong evidence.

Results

From 2048 abstracts, 16 meta-analyses and 55 independent outcomes were included (36 in RCTs and 19 in observational studies). In RCTs of Mg versus placebo/no active treatment, 12 over 36 outcomes reported significant results (p < 0.05). A strong evidence for decreased need for hospitalization in pregnancy and for decreased risk of frequency and intensity of migraine relapses in people with migraine was observed using the GRADE assessment. In observational studies, 9/19 outcomes were significant (p < 0.05). However, only one outcome presented highly suggestive evidence (lower incidence of type 2 diabetes in people with higher Mg intake at baseline) and one suggestive (lower incidence of stroke associated with higher Mg intake at baseline).

Conclusion

Strong evidence according to the GRADE suggests that Mg supplementation can decrease the risk of hospitalization in pregnant women and reduce the intensity/frequency of migraine. Higher Mg intake is associated with a decreased risk of type 2 diabetes and stroke with highly suggestive and suggestive evidence, respectively, in observational studies.
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Metadata
Title
Magnesium and health outcomes: an umbrella review of systematic reviews and meta-analyses of observational and intervention studies
Authors
Nicola Veronese
Jacopo Demurtas
Gabriella Pesolillo
Stefano Celotto
Tommaso Barnini
Giovanni Calusi
Maria Gabriella Caruso
Maria Notarnicola
Rosa Reddavide
Brendon Stubbs
Marco Solmi
Stefania Maggi
Alberto Vaona
Joseph Firth
Lee Smith
Ai Koyanagi
Ligia Dominguez
Mario Barbagallo
Publication date
01-02-2020
Publisher
Springer Berlin Heidelberg
Keywords
Migraine
Stroke
Published in
European Journal of Nutrition / Issue 1/2020
Print ISSN: 1436-6207
Electronic ISSN: 1436-6215
DOI
https://doi.org/10.1007/s00394-019-01905-w

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