Findings

What do systematic reviews say?

5 questions · 5 findings · 3 reviews · Airways

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No studies found 2 · 40%GRADE not reported 0 · 0%Very low 1 · 20%Low 1 · 20%Moderate 0 · 0%High 1 · 20%

Vitamin D vs placebo

Proportion of participants with one or more serious adverse events due to any cause · children and adults with predominantly mild to moderate asthma

Summary of findings table ‐ Vitamin D showed no clear difference in proportion of participants with one or more serious adverse events… compared with placebo (high certainty).

1 finding from 1 review

Vitamin D for the management of asthma 2023 · Cochrane Headline outcomes only
OR 0.89 [0.56, 1.41]
12 studies · 1556 participants
High

Vitamin C vs placebo

Adverse events · adults and children with exercise‐induced bronchoconstriction/asthma

The review found no eligible studies for this question.

1 finding from 1 review

Vitamin C for asthma and exercise‐induced bronchoconstriction 2013 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found

Vitamin C vs placebo

Adverse events · people with asthma

1 finding from 1 review

Vitamin C for asthma and exercise‐induced bronchoconstriction 2013 · Cochrane Headline outcomes only
no estimate extracted
1 study · 41 participants
Very low

Intervention not reported

Adverse events · participants with asthma

1 finding from 1 review

Vitamins C and E for asthma and exercise‐induced bronchoconstriction 2014 · Cochrane Headline outcomes only
no estimate extracted
1 study · 15 participants
Low

Intervention not reported

Adverse events · participants with exercise‐induced asthma

The review found no eligible studies for this question.

1 finding from 1 review

Vitamins C and E for asthma and exercise‐induced bronchoconstriction 2014 · Cochrane Headline outcomes only
no estimate extracted
Studies not reported
No studies found