Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

275 questions · 298 findings · 28 reviews · Dementia and Cognitive Improvement

No studies found 47 · 15.8%GRADE not reported 9 · 3%Very low 45 · 15.1%Low 60 · 20.1%Moderate 104 · 34.9%High 33 · 11.1%

Vitamin E (capsules 2000 IU/day in two divided doses) vs placebo

Number of participants experiencing any serious adverse events · people with Alzheimer's disease

Vitamin E (capsules 2000 IU/day in two divided doses) showed no clear difference in adverse events Number of participants reporting ≥ 1 serious adverse… compared with placebo (moderate certainty).

1 finding from 1 review