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What do systematic reviews say?

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Evidence found and GRADE certainty

1 questions · 1 findings · 1 reviews · Cystic Fibrosis and Genetic Disorders

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

Zinc vs placebo

Frequency of crisis · people with sickle cell disease

Zinc showed no clear difference in frequency of crisis compared with placebo (low certainty).

1 finding from 1 review