Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

101 questions · 107 findings · 15 reviews · Headline outcomes only

No studies found 19 · 17.8%GRADE not reported 5 · 4.7%Very low 33 · 30.8%Low 23 · 21.5%Moderate 23 · 21.5%High 4 · 3.7%

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
Show 3 more findings