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
Any adverse effects (e.g. hypervitaminosis A, as defined by the trialists) · 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
Any adverse effects (e.g. hypervitaminosis A, as defined by the trialists) · 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
Any adverse effects (e.g. hypervitaminosis A, as defined by the trialists) · 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
Hypercalcaemia · term breastfed infants to prevent vitamin D deficiency and improve bone health
Vitamin D given to infants showed no clear difference in adverse effects (hypercalcaemia) compared with placebo or no treatment (low certainty).
1 finding from 1 review
Adverse effects · people with AMD
It is very uncertain whether vitamin E changes adverse effects compared with placebo (very low certainty).
1 finding from 1 review
no estimate extracted
4 participants
Very low
Adverse effects · children under 5 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
Adverse effects · general population
The review found no eligible studies for this question.
1 finding from 1 review
no estimate extracted
Studies not reported
No studies found
Adverse effects · general population
1 finding from 1 review
no estimate extracted
Studies not reported
Moderate
Adverse effects (AE) · general population
1 finding from 1 review
no estimate extracted
Studies not reported
Low
Hypercalcaemia · term breastfed infants to prevent vitamin D deficiency and improve bone health
Vitamin D given to lactating mothers showed no clear difference in adverse effects (hypercalcaemia) compared with placebo or no treatment (low certainty).
1 finding from 1 review
Adverse effects: as reported by studies · retinitis pigmentosa
1 finding from 1 review
Adverse effects (urticaria) Defined as participants reporting urticaria (hives) Dose: 2 g per day · school‐aged children (6 to 15 years) and marine corps recruits (mean age 18.5 years)
It is very uncertain whether vitamin C changes adverse effects (urticaria) Defined as participants reporting… compared with placebo (very low certainty).
1 finding from 1 review
Any adverse effects · 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
Any adverse effects · 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
Adverse effects · people with AMD
Antioxidant multivitamin and mineral supplement may leads to lower adverse effects compared with placebo or no treatment (low certainty).
1 finding from 1 review
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
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
Adverse effects · adults with sickle cell disease (adults with homozygous SCA or sickle beta 0 thalassaemia SCD)
It is very uncertain whether vitamin C 1400 mg plus vitamin E 800 mg changes adverse effects compared with placebo (very low certainty).
1 finding from 1 review
Proportion of participants with adverse effects ‐ measured over 8 weeks · chronic palmoplantar pustulosis
Topical vitamin D derivative showed no clear difference in proportion of participants with adverse effects ‐ measured over 8… compared with placebo (moderate certainty).
1 finding from 1 review