Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

41 questions · 41 findings · 7 reviews

No studies found 4 · 9.8%GRADE not reported 1 · 2.4%Very low 3 · 7.3%Low 13 · 31.7%Moderate 17 · 41.5%High 3 · 7.3%

Zinc vs placebo; no treatment

Stunted after 6 months · the promotion of growth and prevention of infections in infants less than six months of age

Zinc supplementation showed no clear difference in stunted after 6 months compared with placebo; no treatment (moderate certainty).

1 finding from 1 review

Zinc vs placebo; no treatment

Wasted after 6 months · the promotion of growth and prevention of infections in infants less than six months of age

Zinc supplementation showed no clear difference in wasted after 6 months compared with placebo; no treatment (low certainty).

1 finding from 1 review

Zinc supplementation in pregnant women vs supplementation without zinc or placebo to reduce stunting

Birth length · pregnant women

Zinc supplementation in pregnant women showed no clear difference in length (cm) at birth compared with supplementation without zinc or placebo to reduce stunting (moderate certainty).

1 finding from 1 review

Zinc supplementation in pregnant women vs supplementation without zinc or placebo to reduce stunting

Low birth weight (g) · pregnant women

Zinc supplementation in pregnant women showed no clear difference in low birth weight (g) compared with supplementation without zinc or placebo to reduce stunting (moderate certainty).

1 finding from 1 review

Zinc vs placebo

Pulmonary exacerbations number of participants requiring IV antibiotics · children with cystic fibrosis

Summary of findings: Zinc supplementation showed no clear difference in pulmonary exacerbations number of participants requiring IV… compared with placebo (moderate certainty).

1 finding from 1 review

Zinc vs placebo

Adverse events number of participants hospitalised during the trial · children with cystic fibrosis

Summary of findings: Zinc supplementation showed no clear difference in adverse events number of participants hospitalised during the trial compared with placebo (moderate certainty).

1 finding from 1 review

Zinc vs placebo

Need for antibiotics days of antibiotic use · children with cystic fibrosis

It is very uncertain whether summary of findings: Zinc supplementation changes need for antibiotics number of days on IV or oral antibiotics compared with placebo (very low certainty).

1 finding from 1 review