Maternal vitamin B12 deficiency · pregnant women
It is very uncertain whether summary of findings table ‐ Vitamin B12 supplementation changes maternal vitamin B12 deficiency compared with placebo/no vitamin B12 supplementation (very low certainty).
1 finding from 1 review
Health‐related quality of life (HRQL) · people with asthma
1 finding from 1 review
Adverse events · adults and children with exercise‐induced bronchoconstriction/asthma
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Asthma exacerbations · people with asthma
1 finding from 1 review
Lung function: FEV1 mL (change from baseline) · people with asthma
1 finding from 1 review
Asthma symptoms · people with asthma
1 finding from 1 review
Adverse events · people with asthma
1 finding from 1 review
Health‐related quality of life (HRQL) · adults and children with exercise‐induced bronchoconstriction/asthma
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Asthma exacerbations · adults and children with exercise‐induced bronchoconstriction/asthma
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Lung function: FEV1 % drop Postexercise · adults and children with exercise‐induced bronchoconstriction/asthma
1 finding from 1 review
no estimate extracted
1 study · 8 participants
Low
Asthma symptoms · adults and children with exercise‐induced bronchoconstriction/asthma
1 finding from 1 review
no estimate extracted
1 study · 8 participants
Low
Maternal anaemia · pregnant women
It is very uncertain whether summary of findings table ‐ Vitamin B12 supplementation changes maternal anaemia compared with placebo/no vitamin B12 supplementation (very low certainty).
1 finding from 1 review
Miscarriage and spontaneous abortion · pregnant women
1 finding from 1 review
Low birthweight · pregnant women
Summary of findings table ‐ Vitamin B12 supplementation showed no clear difference in low birthweight (< 2500 g) compared with placebo/no vitamin B12 supplementation (low certainty).
1 finding from 1 review
Preterm birth · pregnant women
Summary of findings table ‐ Vitamin B12 supplementation showed no clear difference in preterm birth (< 37 weeks) compared with placebo/no vitamin B12 supplementation (low certainty).
1 finding from 1 review
Child cognitive outcomes · pregnant women
1 finding from 1 review
Neural tube defects ‐ not reported · pregnant women
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Change in BMI · adults and children with cystic fibrosis
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Time to next exacerbation · adults and children with cystic fibrosis
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Adverse events · adults and children with cystic fibrosis
Summary of findings: oral vitamin E supplementation showed no clear difference in adverse events compared with placebo or no treatment (low certainty).
1 finding from 1 review