What do systematic reviews say?

Vitamin D vs placebo

The review found no eligible studies for this question.

• Nutritional interventions for treating foot ulcers in people with diabetes 2020 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Vitamin D vs placebo

The review found no eligible studies for this question.

• Nutritional interventions for treating foot ulcers in people with diabetes 2020 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Vitamin D vs placebo or no treatment

It is very uncertain whether vitamin D changes death (all causes) compared with placebo or no treatment (very low certainty).

• Interventions for preventing bone disease in kidney transplant recipients 2019 · Cochrane Headline outcomes only
  RR 0.49 [0.03, 9.22]
  3 studies · 232 participants
  Very low

Vitamin D vs placebo or no treatment

It is very uncertain whether vitamin D changes cardiovascular death compared with placebo or no treatment (very low certainty).

• Interventions for preventing bone disease in kidney transplant recipients 2019 · Cochrane Headline outcomes only
  RR 0.57 [0.04, 7.57]
  3 studies · 232 participants
  Very low

Vitamin D vs placebo or no treatment

• Interventions for preventing bone disease in kidney transplant recipients 2019 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 40 participants
  Very low

Vitamin D vs placebo or no treatment

It is very uncertain whether vitamin D changes graft loss compared with placebo or no treatment (very low certainty).

• Interventions for preventing bone disease in kidney transplant recipients 2019 · Cochrane Headline outcomes only
  RR 0.11 [0.01, 2.01]
  3 studies · 220 participants
  Very low

Vitamin D vs placebo or no treatment

It is very uncertain whether vitamin D changes fracture compared with placebo or no treatment (very low certainty).

• Interventions for preventing bone disease in kidney transplant recipients 2019 · Cochrane Headline outcomes only
  RR 0.96 [0.1, 8.94]
  5 studies · 299 participants
  Very low

Vitamin D vs placebo or no treatment

It is very uncertain whether vitamin D changes acute graft rejection compared with placebo or no treatment (very low certainty).

• Interventions for preventing bone disease in kidney transplant recipients 2019 · Cochrane Headline outcomes only
  RR 0.98 [0.52, 1.86]
  5 studies · 385 participants
  Very low

Vitamin D vs placebo

It is very uncertain whether vitamin D changes mortality compared with placebo (very low certainty).

• Micronutrient supplementation in adults with HIV infection 2017 · Cochrane Headline outcomes only
  RR 1.15 [0.65, 2.02]
  1 study · 131 participants
  Very low

Vitamin D vs placebo

• Micronutrient supplementation in adults with HIV infection 2017 · Cochrane Headline outcomes only
  no estimate extracted
  0 studies · 0 participants
  GRADE not reported

Vitamin D vs placebo

• Micronutrient supplementation in adults with HIV infection 2017 · Cochrane Headline outcomes only
  no estimate extracted
  4 studies · 288 participants
  Low

Vitamin D vs placebo

• Micronutrient supplementation in adults with HIV infection 2017 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 28 participants
  Very low

Vitamin E vs Placebo (not a true placebo)

Vitamin E showed no clear difference in mucositis eradicated compared with placebo (not a true placebo); GRADE not reported.

• Interventions for treating oral mucositis for patients with cancer receiving treatment 2010 · Cochrane All outcomes
  RR 6.00 [0.89, 40.31]
  1 study · 18 participants
  GRADE not reported

Summary of findings: fat‐soluble vitamin E vs control

The review found no eligible studies for this question.

• Vitamin E supplementation in people with cystic fibrosis 2020 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Summary of findings: fat‐soluble vitamin E vs control

The review found no eligible studies for this question.

• Vitamin E supplementation in people with cystic fibrosis 2020 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Summary of findings: fat‐soluble vitamin E vs control

The review found no eligible studies for this question.

• Vitamin E supplementation in people with cystic fibrosis 2020 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Summary of findings: fat‐soluble vitamin E vs control

• Vitamin E supplementation in people with cystic fibrosis 2020 · Cochrane Headline outcomes only
  no estimate extracted
  6 participants
  GRADE not reported

Vitamin D plus calcium vs placebo or control

Vitamin D [D2, D3 or 25(OH)D] plus calcium showed no clear difference in persons with hypercalcaemia ‐ Vitamin D (D2, D3 or 25(OH)D) plus… compared with control or placebo (low certainty).

• Vitamin D and vitamin D analogues for preventing fractures in post‐menopausal women and older men 2014 · Cochrane Headline outcomes only
  RR 3.29 [0.37, 29.14]
  2 studies · 3853 participants
  Low

Vitamin D plus calcium vs placebo or control

Vitamin D [D2, D3 or 25(OH)D] plus calcium leads to higher persons with renal disease (calculi or insufficiency) ‐ Vitamin D… compared with control or placebo (high certainty).

• Vitamin D and vitamin D analogues for preventing fractures in post‐menopausal women and older men 2014 · Cochrane Headline outcomes only
  RR 1.17 [1.03, 1.34]
  2 studies · 39552 participants
  High

Vitamin D plus calcium vs placebo or control

Vitamin D [D2, D3 or 25(OH)D] plus calcium showed no clear difference in deaths ‐ Vitamin D (D2, D3, 25(OH)D) plus calcium (1 year estimate) compared with control or placebo (high certainty).

• Vitamin D and vitamin D analogues for preventing fractures in post‐menopausal women and older men 2014 · Cochrane Headline outcomes only
  RR 0.94 [0.87, 1.02]
  6 studies · 46794 participants
  High