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What Doctors Don't Tell You

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March 2018 (Vol. 28 Issue 12)

Magnesium and strokes



31 Jan 2010 @ 20:25PM

I think there is a mistake on one of the pages on this site:

It says, "You can reduce your risk of stroke by taking magnesium supplements, a new study has discovered. But you should be over 60 before you begin supplementing - as it may have the reverse effect in anyone younger."

When I looked up the study itself, it wasn't looking at supplements at all, only dietary intake in male Finnish smokers over the age of 50. It found that the risk of strokes was slightly lower in those who had the greatest dietary intake of magnesium, and that effect was largest in the under 60s. This is the opposite of what the web page says.

"Results: After adjustment for age and cardiovascular risk factors, a high magnesium intake was associated with a statistically significant lower risk of cerebral infarction but not with intracerebral or subarachnoid hemorrhages. The multivariate relative risk of cerebral infarction was 0.85 (95% confidence interval, 0.76-0.97; P for trend=.004) for men in the highest quintile of magnesium intake compared with those in the lowest quintile. The inverse association between magnesium intake and cerebral infarction was stronger in men younger than 60 years (relative risk, 0.76; 95% confidence interval, 0.64-0.89; P for interaction=.02). Calcium, potassium, and sodium intake was not significantly associated with risk of any subtype of stroke (P for trend.05). Conclusion: These findings in male smokers suggest that a high magnesium intake may play a role in the primary prevention of cerebral infarction." [My bold]

I think you should perhaps make a correction to that page.


Paul Holloway

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