Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,805 questions · 2,912 findings · 307 reviews · Headline outcomes only

No studies found 706 · 24.2%GRADE not reported 133 · 4.6%Very low 786 · 27%Low 696 · 23.9%Moderate 474 · 16.3%High 117 · 4%

Vitamin A vs placebo

Incidence of acute URTIs during the study period (the number of acute URTIs over a period of time) · children up to the age of 7 at risk of upper respiratory tract infection

Summary of findings table ‐ Vitamin A supplements showed no clear difference in incidence of acute URTIs during the study period (the number of… compared with placebo (low certainty).

1 finding from 1 review

Home (point‐of‐use) fortification of foods with multiple micronutrient powders vs placebo or no intervention

Anaemia · children aged 6 to 23 months

Home (point‐of‐use) fortification of foods with multiple… probably leads to lower anaemia (haemoglobin values lower than 110 g/L) compared with no intervention or placebo (moderate certainty).

1 finding from 1 review

Home (point‐of‐use) fortification of foods with multiple micronutrient powders vs placebo or no intervention

Iron deficiency (as defined by trialists) · children aged 6 to 23 months

Home (point‐of‐use) fortification of foods with multiple… leads to lower iron deficiency (as defined by trialists) compared with no intervention or placebo (high certainty).

1 finding from 1 review

Home (point‐of‐use) fortification of foods with multiple micronutrient powders vs an iron‐only supplement

Anaemia · children aged 6 to 23 months

Home (point‐of‐use) fortification of foods with multiple… showed no clear difference in anaemia (haemoglobin values lower than 110 g/L) compared with an iron‐only supplement (low certainty).

1 finding from 1 review