The Claim

Among individuals with recent lacunar stroke, vitamin B12 deficiency (serum level <150 pmol/L) is associated with significantly higher mean fatigue scores (90.7 vs. 59.4) and higher mean depression scores (6.62 vs. 3.89), independent of age and white matter lesion severity.

Source: Association of Vitamin B12 Deficiency with Fatigue and Depression after Lacunar Stroke

What the research says

Supports is higher

Support is ahead, but a single strong opposing study can change this.

Supports
44score
Challenges
0score

These are independent scores, not a percentage. Higher-grade studies count more, so a single strong opposing study can outweigh several weaker ones.

Correlation
1 study reviewed
In plain English

In people who recently had a small stroke, low vitamin B12 levels are linked to higher reported fatigue and more severe depressive symptoms compared to those with normal vitamin B12 levels, even when accounting for age and brain damage severity.

See the scientific wording

Among individuals with recent lacunar stroke, vitamin B12 deficiency (serum level <150 pmol/L) is associated with significantly higher levels of fatigue and depressive symptoms, with mean fatigue scores of 90.7 versus 59.4 and mean depression scores of 6.62 versus 3.89, independent of age and white matter lesion severity, suggesting a potential link between nutritional status and neuropsychological recovery after stroke.

Why this might work

Low vitamin B12 stops the body from making healthy insulation around nerve fibers and reduces the production of key brain chemicals that regulate mood and energy, leading to increased tiredness and sadness.

Suggested mechanismbased on 1 study

What the research says

1 study

  1. Study: Association of Vitamin B12 Deficiency with Fatigue and Depression after Lacunar Stroke

    People who recently had a small stroke and had low vitamin B12 felt much more tired and more depressed than those with normal B12 levels, even when doctors accounted for their age and brain changes. This suggests B12 might play a role in how people feel after a stroke.

Score breakdown, mechanism chain, raw evidence, ideal studies needed & 1 supporting studies

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