What do systematic reviews say?

250 mg magnesium oxide supplement 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

Oral nutritional supplements 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

1000 mg/day omega‐3 fatty acid from flaxseed oil supplement 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

Magnesium and vitamin E co‐supplementation 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

Arginine, glutamine and β‐hydroxy‐β‐methylbutyrate supplement vs placebo

It is very uncertain whether arginine, glutamine and β‐hydroxy‐β‐methylbutyrate supplement changes quality of life compared with placebo (very low certainty).

• Nutritional interventions for treating foot ulcers in people with diabetes 2020 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 270 participants
  Very low

Laxative vs placebo

The review found no eligible studies for this question.

• Interventions for preventing postpartum constipation 2020 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Souvenaid vs placebo

• Souvenaid for Alzheimer's disease 2020 · Cochrane Headline outcomes only
  no estimate extracted
  0 studies · 0 participants
  GRADE not reported

N‐acetylcysteine vs placebo

The review found no eligible studies for this question.

• N‐acetylcysteine for non‐paracetamol (acetaminophen)‐related acute liver failure 2020 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

CHRONIC: ACEi or ARB vs placebo

The review found no eligible studies for this question.

• Pharmacological interventions for heart failure in people with chronic kidney disease 2020 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

CHRONIC: Beta‐blockers vs placebo

The review found no eligible studies for this question.

• Pharmacological interventions for heart failure in people with chronic kidney disease 2020 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Aldosterone antagonists vs placebo

The review found no eligible studies for this question.

• Pharmacological interventions for heart failure in people with chronic kidney disease 2020 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

ACUTE: Serelaxin vs placebo

The review found no eligible studies for this question.

• Pharmacological interventions for heart failure in people with chronic kidney disease 2020 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Usual care with ivabradine vs Placebo, no intervention or usual care (with or without placebo)

• Ivabradine as adjuvant treatment for chronic heart failure 2020 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 179 participants
  Low
• Ivabradine as adjuvant treatment for chronic heart failure 2020 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Usual care with ivabradine vs Placebo, no intervention or usual care (with or without placebo)

• Ivabradine as adjuvant treatment for chronic heart failure 2020 · Cochrane Headline outcomes only
  no estimate extracted
  2 studies · 2102 participants
  Low
• Ivabradine as adjuvant treatment for chronic heart failure 2020 · Cochrane Headline outcomes only
  no estimate extracted
  1 study · 60 participants
  Low

NSAIDs vs placebo control

The review found no eligible studies for this question.

• Non‐steroidal anti‐inflammatory drugs for heavy menstrual bleeding 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Summary of findings: oral β‐carotene vs placebo

The review found no eligible studies for this question.

• Antioxidant supplementation for lung disease in cystic fibrosis 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Summary of findings: oral vitamin E supplementation vs placebo or no treatment

The review found no eligible studies for this question.

• Antioxidant supplementation for lung disease in cystic fibrosis 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Sulthiame add‐on vs placebo

The review found no eligible studies for this question.

• Sulthiame add‐on therapy for epilepsy 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found

Homeopathy vs placebo

The review found no eligible studies for this question.

• Homeopathy for treatment of irritable bowel syndrome 2019 · Cochrane Headline outcomes only
  no estimate extracted
  Studies not reported
  No studies found