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Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

1 questions · 1 findings · 1 reviews · Headline outcomes only

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No studies found 0 · 0%GRADE not reported 0 · 0%Very low 1 · 100%Low 0 · 0%Moderate 0 · 0%High 0 · 0%

Dietary supplements vs placebo

Zinc sulphate versus placebo Adverse effects · women with moderate or severe primary dysmenorrhoea

It is very uncertain whether dietary supplements changes zinc sulphate versus placebo Adverse effects compared with placebo (very low certainty).

1 finding from 1 review