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 onlyno estimate extracted1 study · 41 participantsVery low
Findings
What do systematic reviews say?
134 questions · 143 findings · 12 reviews
No studies found 17 · 11.9%GRADE not reported 58 · 40.6%Very low 17 · 11.9%Low 26 · 18.2%Moderate 14 · 9.8%High 11 · 7.7%
Vitamin C vs placebo
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
- Vitamin C for asthma and exercise‐induced bronchoconstriction 2013 · Cochrane Headline outcomes onlyno estimate extractedStudies not reportedNo studies found
Vitamin C vs placebo
Asthma exacerbations · 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 onlyno estimate extractedStudies not reportedNo studies found
Vitamin C vs placebo
Lung function: FEV1 % drop Postexercise · adults and children with exercise‐induced bronchoconstriction/asthma
1 finding from 1 review
- Vitamin C for asthma and exercise‐induced bronchoconstriction 2013 · Cochrane Headline outcomes onlyno estimate extracted1 study · 8 participantsLow
Vitamin C vs placebo
Asthma symptoms · adults and children with exercise‐induced bronchoconstriction/asthma
1 finding from 1 review
- Vitamin C for asthma and exercise‐induced bronchoconstriction 2013 · Cochrane Headline outcomes onlyno estimate extracted1 study · 8 participantsLow
Vitamin A supplementation (200,000 to 400,000 IU) vs placebo or no treatment
Maternal death · women in the postpartum period
Vitamin A supplementation (200,000 to 400,000 IU) showed no clear difference in maternal mortality compared with placebo or no treatment (moderate certainty).
1 finding from 1 review
- HR 1.01 [0.44, 2.21]1 study · 8577 participantsModerate
Vitamin A supplementation (200,000 to 400,000 IU) vs placebo or no treatment
Maternal morbidity (diarrhoea, respiratory infections, fever) · women in the postpartum period
1 finding from 1 review
- no estimate extracted1 study · 50 participantsVery low
Vitamin A supplementation (200,000 to 400,000 IU) vs placebo or no treatment
Adverse effects on women: abdominal cramps · women in the postpartum period
Vitamin A supplementation (200,000 to 400,000 IU) showed no clear difference in maternal adverse effects after administration: abdominal pain compared with placebo or no treatment (low certainty).
1 finding from 1 review
- RR 1.28 [0.95, 1.73]1 study · 786 participantsLow
Vitamin A supplementation (200,000 to 400,000 IU) vs placebo or no treatment
Maternal breast milk retinol concentration · women in the postpartum period
1 finding from 1 review
- no estimate extracted6 studies · 837 participantsLow
Vitamin A supplementation (200,000 to 400,000 IU) vs placebo or no treatment
Change in Infant Mortality Rate per 1000 live births1 · women in the postpartum period
Vitamin A supplementation (200,000 to 400,000 IU) showed no clear difference in infant mortality compared with placebo or no treatment (low certainty).
1 finding from 1 review
- RR 1.08 [0.77, 1.52]5 studies · 6090 participantsLow
Vitamin A supplementation (200,000 to 400,000 IU) vs placebo or no treatment
Infant morbidity (gastroenteritis) · women in the postpartum period
It is very uncertain whether vitamin A supplementation (200,000 to 400,000 IU) changes infant morbidity (gastroenteritis) compared with placebo or no treatment (very low certainty).
1 finding from 1 review
- RR 6.03 [0.3, 121.82]1 study · 84 participantsVery low
Vitamin A supplementation (200,000 to 400,000 IU) vs placebo or no treatment
Infant adverse effects: bulging fontanelle · women in the postpartum period
Vitamin A supplementation (200,000 to 400,000 IU) showed no clear difference in infant adverse effects: bulging fontanelle compared with placebo or no treatment (low certainty).
1 finding from 1 review
- RR 2 [0.61, 6.55]1 study · 444 participantsLow
High-dose vitamin D3 supplementation during pregnancy (2400 IU/day from pregnancy week 24 to 1 week postpartum, in addition to the recommended 400 IU/day) vs Low-dose (standard) vitamin D supplementation as recommended in national pregnancy guidelines
Caries presence in primary teeth · For interventions, pregnant women, mothers or other caregivers of infants in the first year of life; for outcomes, children up to 6 years…
It is very uncertain whether high-dose vitamin D3 supplementation during pregnancy (2400 IU/day… changes caries presence in primary teeth compared with low-dose (standard) vitamin D supplementation as recommended in… (very low certainty).
1 finding from 1 review
- Interventions with pregnant women, new mothers and other primary caregivers for preventing early childhood caries 2024 · Cochrane All outcomesChildren assessed at 6 yrsRR 0.99 [0.70, 1.41]1 study · 496 participantsVery low
High-dose vitamin D3 supplementation during pregnancy (2400 IU/day from pregnancy week 24 to 1 week postpartum, in addition to the recommended 400 IU/day) vs Low-dose (standard) vitamin D supplementation as recommended in national pregnancy guidelines
Dental caries · For interventions, pregnant women, mothers or other caregivers of infants in the first year of life; for outcomes, children up to 6 years…
The review found no eligible studies for this question.
2 findings from 1 review
- Interventions with pregnant women, new mothers and other primary caregivers for preventing early childhood caries 2024 · Cochrane All outcomesdmft was listed in the SoF table but not assessed (not reported for this comparison).0 studiesNo studies found
- Interventions with pregnant women, new mothers and other primary caregivers for preventing early childhood caries 2024 · Cochrane All outcomesdmfs was listed in the SoF table but not assessed (not reported for this comparison).0 studiesNo studies found