Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

324 questions · 341 findings · 54 reviews · Headline outcomes only

No studies found 120 · 35.2%GRADE not reported 9 · 2.6%Very low 97 · 28.4%Low 80 · 23.5%Moderate 25 · 7.3%High 10 · 2.9%

Zinc vs placebo

BMD Z score (total hip/femoral neck) · children and adults with β‐thalassaemia major and low bone mass

Summary of findings – zinc probably leads to higher BMD Z score (total hip/femoral neck) compared with placebo (moderate certainty).

1 finding from 1 review

Zinc vs placebo

BMD Z score (lumbar spine) · children and adults with β‐thalassaemia major and low bone mass

Summary of findings – zinc probably leads to higher BMD Z score (lumbar spine) compared with placebo (moderate certainty).

1 finding from 1 review