Incidence: lung cancer · healthy male physicians, period: 1997 to 2007 and female health professionals, period: 1998 to 2005
Vitamin C showed no clear difference in incidence: lung cancer compared with placebo (moderate certainty).
1 finding from 1 review
Incidence: lung cancer ‐ men · healthy male physicians, period: 1997 to 2007 and female health professionals, period: 1998 to 2005
Vitamin C showed no clear difference in incidence: lung cancer ‐ men compared with placebo (high certainty).
1 finding from 1 review
All‐cause mortality · adults with HIV infection
1 finding from 1 review
Morbidity · adults with HIV infection
1 finding from 1 review
CD4 cell count · adults with HIV infection
1 finding from 1 review
Viral load · adults with HIV infection
1 finding from 1 review
Mucositis eradicated · People with cancer receiving chemotherapy or radiotherapy (or both) who have oral mucositis
Vitamin E showed no clear difference in mucositis eradicated compared with placebo (not a true placebo); GRADE not reported.
1 finding from 1 review
Visual field sensitivity (visual field) · retinitis pigmentosa
1 finding from 1 review
Visual acuitychange in logMAR visual acuity, may be reported as ETDRS · retinitis pigmentosa
It is very uncertain whether vitamin A and fish oils (docosahexaenoic acid) changes visual acuitychange in logMAR visual acuity, may be reported as ETDRS compared with placebo, vitamins (including vitamin A), or no therapy (very low certainty).
1 finding from 1 review
Electroretinography (ERG) · retinitis pigmentosa
1 finding from 1 review
Optical coherence tomography (OCT) · retinitis pigmentosa
1 finding from 1 review
Adverse effects: as reported by studies · retinitis pigmentosa
1 finding from 1 review
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
Improvement in mucositis · People with cancer receiving chemotherapy or radiotherapy (or both) who have oral mucositis
Vitamin E (topical) led to higher improvement in mucositis compared with vitamin E (swallowed); GRADE not reported.
1 finding from 1 review
Mucositis eradicated · People with cancer receiving chemotherapy or radiotherapy (or both) who have oral mucositis
Vitamin E (topical) led to higher mucositis eradicated compared with vitamin E (swallowed); GRADE not reported.
1 finding from 1 review