Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

63 questions · 69 findings · 10 reviews · Headline outcomes only

No studies found 11 · 15.9%GRADE not reported 5 · 7.2%Very low 25 · 36.2%Low 11 · 15.9%Moderate 14 · 20.3%High 3 · 4.3%

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