Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

30 questions · 31 findings · 6 reviews

No studies found 7 · 22.6%GRADE not reported 3 · 9.7%Very low 0 · 0%Low 5 · 16.1%Moderate 14 · 45.2%High 2 · 6.5%

Multivitamin plus iron plus folate vs iron plus folate

Total fetal loss (including miscarriages or combined miscarriages and stillbirths) · pregnant women

Multivitamin plus iron plus folate showed no clear difference in total fetal loss (including miscarriages or combined miscarriages… compared with iron plus folate (high certainty).

1 finding from 1 review

Multivitamin vs placebo

Average mouth pain during RAS episodes · Participants with a previous or current history of recurrent aphthous stomatitis (RAS), diagnosed on history and clinical examination;…

Daily multivitamin showed no clear difference in average mouth pain during RAS episodes compared with placebo; GRADE not reported.

1 finding from 1 review

Multivitamin vs placebo

Average number of new lesions per week · Participants with a previous or current history of recurrent aphthous stomatitis (RAS), diagnosed on history and clinical examination;…

Daily multivitamin showed no clear difference in mean number of new lesions compared with placebo; GRADE not reported.

1 finding from 1 review