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Evidence found and GRADE certainty

355 questions · 361 findings · 45 reviews

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No studies found 99 · 27.4%GRADE not reported 86 · 23.8%Very low 74 · 20.5%Low 55 · 15.2%Moderate 40 · 11.1%High 7 · 1.9%

Foods fortified with zinc alone vs same foods without adding zinc

Stunting · general population of all age groups (including pregnant women) from any country, over two years of age

Foods fortified with zinc alone showed no clear difference in stunting (author defined) compared with same foods without adding zinc (low certainty).

1 finding from 1 review

Foods fortified with zinc alone vs same foods without adding zinc

Underweight · general population of all age groups (including pregnant women) from any country, over two years of age

Foods fortified with zinc alone showed no clear difference in underweight (author defined) compared with same foods without adding zinc (low certainty).

1 finding from 1 review

Zinc supplements vs Acupuncture

Outcome not reported · Patients with taste disturbances (dysgeusia/hypogeusia; idiopathic, zinc-deficient, or secondary to chronic renal failure)

The review found no eligible studies for this question.

1 finding from 1 review
  • Interventions for managing taste disturbances 2017 · Cochrane All outcomes
    Authors' conclusions: We were unable to draw any conclusions regarding the superiority of zinc supplements or acupuncture as none of the trials compared these interventions.
    0 studies
    No studies found

Zinc oxide and eugenol (ZOE) vs Zinc oxide and propolis (ZOP)

Outcome not reported · Children with extensive decay involving the dental pulp in primary teeth

The review found no eligible studies for this question.

1 finding from 1 review

Zinc oxide and eugenol (ZOE) vs Ozonated sesame oil-zinc oxide (ZO)

Outcome not reported · Children with extensive decay involving the dental pulp in primary teeth

The review found no eligible studies for this question.

1 finding from 1 review

0.2% zinc sulphate toothpaste vs Placebo toothpaste (without zinc)

Volatile sulphur compounds (VSC), halimeter · Adolescents and adults aged over 16 years with clinical or self-assessed halitosis of oral origin; excluding induced or physiological…

0.2% zinc sulphate toothpaste led to lower volatile sulphur compounds (VSC) compared with placebo toothpaste (without zinc); GRADE not reported.

1 finding from 1 review

0.2% zinc sulphate toothpaste vs Placebo toothpaste (without zinc)

Dentist-reported organoleptic test (OLT) score (scale 0 to 5) · Adolescents and adults aged over 16 years with clinical or self-assessed halitosis of oral origin; excluding induced or physiological…

It is very uncertain whether 0.2% zinc sulphate toothpaste changes dentist-reported organoleptic test (OLT) score (scale 0 to 5) compared with placebo toothpaste (without zinc) (very low certainty).

1 finding from 1 review

Zinc supplementation in pregnant women vs supplementation without zinc or placebo to reduce stunting

Birth length · pregnant women

Zinc supplementation in pregnant women showed no clear difference in length (cm) at birth compared with supplementation without zinc or placebo to reduce stunting (moderate certainty).

1 finding from 1 review

Zinc supplementation in pregnant women vs supplementation without zinc or placebo to reduce stunting

Low birth weight (g) · pregnant women

Zinc supplementation in pregnant women showed no clear difference in low birth weight (g) compared with supplementation without zinc or placebo to reduce stunting (moderate certainty).

1 finding from 1 review

Zinc chloride + sodium chlorite mouthrinse (TriOral) vs Control mouthrinse (containing neither zinc chloride nor sodium chlorite)

Volatile sulphur compounds (VSC), halimeter · Adults over 18 years with a clinical or self-assessed diagnosis of halitosis, without significant comorbidity (e.g. diabetes) or…
1 finding from 1 review
  • Mouthrinses for the treatment of halitosis 2008 · Cochrane All outcomes
    4 weeks
    Codipilly 2004: precise data could not be extracted (results presented as graph plots). Reported VSC reductions from baseline for zinc chloride + sodium chlorite (TriOral): 55% (P < 0.01) at 2 weeks and 60% (P < 0.01)…
    1 study
    GRADE not reported

Zinc chloride + sodium chlorite mouthrinse (TriOral) vs Control mouthrinse (containing neither zinc chloride nor sodium chlorite)

Organoleptic assessment (indirect surrogate salivary organoleptic score) · Adults over 18 years with a clinical or self-assessed diagnosis of halitosis, without significant comorbidity (e.g. diabetes) or…
1 finding from 1 review
  • Mouthrinses for the treatment of halitosis 2008 · Cochrane All outcomes
    4 weeks
    Codipilly 2004: only indirect surrogate salivary organoleptic scores were reported (not organoleptic breath scores); no accurate deductions could be made from the reported values.
    1 study
    GRADE not reported