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What do systematic reviews say?

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Evidence found and GRADE certainty

3,018 questions · 3,100 findings · 369 reviews · Headline outcomes only

No studies found 774 · 25%GRADE not reported 108 · 3.5%Very low 727 · 23.5%Low 840 · 27.1%Moderate 474 · 15.3%High 177 · 5.7%

Summary of findings: garlic supplementation vs placebo

FEV1 (% predicted): mean change from baseline · children aged over eight and adults with cystic fibrosis and chronic pulmonary infection with P aeruginosa

Summary of findings: garlic supplementation showed no clear difference in respiratory function change from baseline in % predicted FEV1 compared with placebo (moderate certainty).

1 finding from 1 review