Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

65 questions · 71 findings · 11 reviews

No studies found 11 · 15.5%GRADE not reported 5 · 7%Very low 27 · 38%Low 11 · 15.5%Moderate 14 · 19.7%High 3 · 4.2%

B vitamins vs placebo

Supplementation with beta‐carotene + vit C + vit E Overall cognitive functioning · cognitively healthy people in mid and late life
6 findings from 1 review
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