Findings

What do systematic reviews say?

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Evidence found and GRADE certainty

92 questions · 104 findings · 16 reviews · Headline outcomes only

No studies found 16 · 15.4%GRADE not reported 0 · 0%Very low 28 · 26.9%Low 35 · 33.7%Moderate 24 · 23.1%High 1 · 1%

Adjunctive antioxidants for schizophrenia vs placebo

Adverse effects: 1. Serious (any time point) ‐ any serious adverse effect Various methods · patients with schizophrenia

Adjunctive antioxidants for schizophrenia showed no clear difference in adverse effects: 1. Serious (any time point) ‐ any serious adverse… compared with placebo (low certainty).

1 finding from 1 review

Summary of findings table ‐ Protein, arginine, zinc and antioxidants vs standard diet or placebo

The proportion of pressure ulcers healed · residents of long‐term care (≥ 65 years) with pressure ulcers; inpatients with pressure ulcers

It is very uncertain whether summary of findings table ‐ Protein, arginine, zinc and antioxidants changes pressure ulcers healed compared with standard diet or placebo (very low certainty).

1 finding from 1 review