Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

2,447 questions · 2,590 findings · 266 reviews

No studies found 699 · 27%GRADE not reported 289 · 11.2%Very low 614 · 23.7%Low 605 · 23.4%Moderate 322 · 12.4%High 61 · 2.4%

iron‐fortified wheat flour with or without other micronutrients added vs fortified wheat flour with same micronutrients (but not iron)

Infection or inflammation at individual level as measured by C‐reactive protein (CRP) (only in children 2 to 11 years of age) · general population of all age groups (including pregnant women) from any country, over two years of age
1 finding from 1 review

Intervention not reported

No active intervention(2 RCTs, 256 participants) · people with liver cirrhosis and oesophageal varices with no history of bleeding

It is very uncertain whether the intervention changes no active intervention(2 RCTs, 256 participants) (very low certainty).

1 finding from 1 review

Intervention not reported

No active intervention(2 RCTs, 208 participants) · people with liver cirrhosis and oesophageal varices with no history of bleeding

It is very uncertain whether the intervention changes no active intervention(2 RCTs, 208 participants) (very low certainty).

1 finding from 1 review

Oral iron sulphate vs oral iron hydroxide polymaltose complex

Serious adverse events ‐ active or inactive disease (14 days) · IBD patients

It is very uncertain whether oral iron sulphate changes serious adverse events ‐ active or inactive disease (14 days) compared with oral iron hydroxide polymaltose complex (very low certainty).

1 finding from 1 review