Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

331 questions · 353 findings · 56 reviews

No studies found 41 · 11.6%GRADE not reported 74 · 21%Very low 128 · 36.3%Low 66 · 18.7%Moderate 32 · 9.1%High 12 · 3.4%

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

Iron deficiency (using ferritin concentrations) · preschool and school‐age children

Point‐of‐use fortification of foods with micronutrients powders (MNP) probably leads to lower iron deficiency (defined by using ferritin concentrations less than… 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

Diarrhoea · preschool and school‐age children

Point‐of‐use fortification of foods with micronutrients powders (MNP) showed no clear difference in diarrhoea (≥ 3 liquid stools per day) compared with no intervention or placebo (low certainty).

1 finding from 1 review

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

Any adverse effects (e.g. hypervitaminosis A, as defined by the trialists) · preschool and school‐age children

Point‐of‐use fortification of foods with micronutrients powders (MNP) showed no clear difference in adverse effects (any, as defined by trialists) compared with no intervention or placebo (moderate certainty).

1 finding from 1 review

Xylitol sucking tablets (1 g/day) vs no treatment

Number of infants with a caries increment · Infants/young children (primary teeth; baseline about 1 to 3 years)

Xylitol sucking tablets (1 g/day) showed no clear difference in number of infants with a caries increment compared with no treatment; GRADE not reported.

1 finding from 1 review

Xylitol candy (7.5 g/day) vs Control (sorbitol) candy

Caries increment (dmfs, primary and permanent teeth combined) · Children (mixed dentition; baseline about 8 years)
1 finding from 1 review

Xylitol chewing gum vs No treatment or non-cariogenic control

Outcome not reported · Children and adults

The review found no eligible studies for this question.

1 finding from 1 review

Intervention not reported

Number of subjects who had one or more exacerbations over the study period in adults ( · Adults and children with asthma

The intervention showed no clear difference in number of subjects who had one or more exacerbations over the study… (moderate certainty).

1 finding from 1 review