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
Serum/plasma retinol (μmol/L) · general population over 2 years of age
1 finding from 1 review
All‐cause mortality · general population over 2 years of age
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
All‐cause morbidity · general population over 2 years of age
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
All‐cause mortality · general population over 2 years of age
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
All‐cause morbidity · general population over 2 years of age
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Serum/plasma retinol (μmol/L) · general population over 2 years of age
1 finding from 1 review
Haemoglobin (g/dL) · general population of all age groups (including pregnant women) from any country, over two years of age
1 finding from 1 review
Serum/plasma retinol (μmol/L) · general population of all age groups (including pregnant women) from any country, over two years of age
1 finding from 1 review
Any adverse effects of vitamin supplementation sufficient to stop supplementation · pregnant women
Vitamin C and vitamin E showed no clear difference in any adverse effects of vitamin supplementation sufficient to stop… compared with placebo (moderate certainty).
1 finding from 1 review
Maternal vitamin D concentration at term (25‐hydroxyvitamin D) (nmol/L) (ALL) · pregnant women
Meta-analysis of randomised trials of vitamin D supplementation for Maternal vitamin D concentrations at term: WMD 47.08 (95% CI 23.76 to 70.39), statistically significant. Umbrella review outcome-level evidence grade: Probable.
1 finding from 1 review
WMD 47.08 [23.76, 70.39]
4 studies
GRADE not reported
Serum 25-hydroxyvitamin D level · people with sickle cell disease
1 finding from 1 review
Nutritional rickets‐ biochemical · term breastfed infants to prevent vitamin D deficiency and improve bone health
1 finding from 1 review
Hypercalcaemia · term breastfed infants to prevent vitamin D deficiency and improve bone health
Vitamin D given to infants showed no clear difference in adverse effect (hypercalcaemia) compared with vitamin D given to lactating mothers (low certainty).
1 finding from 1 review
Vitamin A deficiency · general population of all age groups (including pregnant women) from any country, over two years of age
Rice fortified with iron alone or in combination with other… showed no clear difference in vitamin A deficiency (as defined by the study authors) compared with unfortified rice (no micronutrients added) (low certainty).
1 finding from 1 review
Intervention not reported
Vitamin A deficiency disorders · children and adults with CF
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Intervention not reported
Vitamin A deficiency: retinol < 0.7 μmol/L · infants 1 to 6 months of age
The intervention showed no clear difference in vitamin A deficiency: retinol < 0.7 μmol/L (moderate certainty).
1 finding from 1 review
Early or late miscarriage · pregnant women
Multivitamin plus iron plus folate showed no clear difference in early or late miscarriage ‐ Multivitamin + iron + folic acid versus… compared with iron plus folate (moderate certainty).
1 finding from 1 review
Stillbirth ‐ Multivitamin + iron + folic acid versus iron + folic acid · pregnant women
Multivitamin plus iron plus folate leads to lower stillbirth ‐ Multivitamin + iron + folic acid versus iron + folic acid compared with iron plus folate (high certainty).
1 finding from 1 review
Total fetal loss (including miscarriages or combined miscarriages and stillbirths) · pregnant women
Multivitamin plus iron plus folate showed no clear difference in total fetal loss (including miscarriages or combined miscarriages… compared with iron plus folate (high certainty).
1 finding from 1 review