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Evidence found and GRADE certainty

1,100 questions · 1,164 findings · 107 reviews

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No studies found 280 · 24.1%GRADE not reported 159 · 13.7%Very low 292 · 25.1%Low 274 · 23.5%Moderate 113 · 9.7%High 46 · 4%

Vegetarian diet (any diet excluding all meat, poultry and fish) vs Nonvegetarian diet

Dental erosion · General population (children and adults) assessed for dental hard-tissue health

Among adults and excluding the outlier study, vegetarian diet was associated with higher odds of dental erosion with no heterogeneity (OR 2.56, 95% CI 1.77 to 3.71; ungraded).

4 findings from 1 review
Show 1 more finding

Vegetarian diet (any diet excluding all meat, poultry and fish) vs Nonvegetarian diet

Noncarious/cervical lesions and tooth wear (measures other than pooled dental erosion) · General population (children and adults) assessed for dental hard-tissue health

Beyond dental erosion, vegetarians tended to have a higher prevalence of other NCCL and tooth wear than nonvegetarians, reported narratively (ungraded).

1 finding from 1 review
  • Vegetarian diet and its possible influence on dental health: A systematic literature review. 2020 All outcomes
    Multiple countries (mostly India; also Finland and other European countries, Brazil, Trinidad and Tobago); community and clinical settings
    Eleven studies reported on NCCL using six definitions (presence of NCCL, presence of dental erosion, presence and severity of tooth wear, dental abrasion, cervical buccal defects); the six reporting presence of dental…
    Studies not reported
    GRADE not reported

Vegetarian diet (any diet excluding all meat, poultry and fish) vs Nonvegetarian diet

Number of natural teeth (missing/present teeth, edentulousness, MT component of DMFT) · General population (children and adults) assessed for dental hard-tissue health

Evidence on the number of natural teeth was conflicting and could not be pooled (ungraded).

1 finding from 1 review
  • Vegetarian diet and its possible influence on dental health: A systematic literature review. 2020 All outcomes
    Multiple countries (mostly India; also Finland and other European countries, Brazil, Trinidad and Tobago); community and clinical settings
    Seven studies reported on the number of teeth with conflicting findings; meta-analysis was not possible due to inconsistent outcome definitions. One study found vegetarians had significantly more teeth; two found no…
    7 studies
    GRADE not reported

Vegetarian diet (any diet excluding all meat, poultry and fish) vs Nonvegetarian diet

Caries experience (mean DMFT) · General population (children and adults) assessed for dental hard-tissue health

Among adults, the lower DMFT score in vegetarians was smaller and not statistically significant (mean difference -0.09, 95% CI -0.32 to 0.13; ungraded).

2 findings from 1 review

Vegetarian diet (any diet excluding all meat, poultry and fish) vs Nonvegetarian diet

Dental caries measures other than pooled DMFT (DMFS, decayed/filled surfaces and teeth, root caries, nonvisible lesions, white spots) · General population (children and adults) assessed for dental hard-tissue health

Evidence on other dental-caries measures was inconsistent: some indices (decayed surfaces/teeth, root caries, white spots) were higher in vegetarians while some studies found lower caries in vegetarian children (ungraded).

1 finding from 1 review
  • Vegetarian diet and its possible influence on dental health: A systematic literature review. 2020 All outcomes
    Multiple countries (mostly India; also Finland and other European countries, Brazil, Trinidad and Tobago); community and clinical settings
    Eleven studies reported dental caries using 11 definitions; four (DMFT) were meta-analysed (see O2). Narrative findings were inconsistent: DMFS results were mixed; decayed surfaces and decayed teeth and percentages of…
    Studies not reported
    GRADE not reported

Summary of findings table ‐ Low‐carbohydrate weight‐reducing diets vs balanced‐carbohydrate weight‐reducing diets

Change in weight (kg) · overweight and obese participants without T2DM (weight‐reducing phase only)
2 findings from 1 review

Summary of findings table ‐ Low‐carbohydrate weight‐reducing diets vs balanced‐carbohydrate weight‐reducing diets

Weight loss of at least 5% at ≥ 12 months ‐ not measured · overweight and obese participants without T2DM (weight‐reducing phase followed by weight maintenance phase)

The review found no eligible studies for this question.

1 finding from 1 review

Summary of findings table ‐ Low‐carbohydrate weight‐reducing diets vs balanced‐carbohydrate weight‐reducing diets

Cardiovascular mortality ‐ not measured · overweight and obese participants without T2DM (weight‐reducing phase followed by weight maintenance phase)

The review found no eligible studies for this question.

1 finding from 1 review

Summary of findings table ‐ Low‐carbohydrate weight‐reducing diets vs balanced‐carbohydrate weight‐reducing diets

LDL cholesterol (mmol/L), change from baseline · overweight and obese participants without T2DM (weight‐reducing phase followed by weight maintenance phase)
1 finding from 1 review

Summary of findings table ‐ Low‐carbohydrate weight‐reducing diets vs balanced‐carbohydrate weight‐reducing diets

Constipation at 3 to < 12 months ‐ not measured · overweight and obese participants without T2DM (weight‐reducing phase followed by weight maintenance phase)

The review found no eligible studies for this question.

1 finding from 1 review

Summary of findings table ‐ Low‐carbohydrate weight‐reducing diets vs balanced‐carbohydrate weight‐reducing diets

Change in weight (kg) · overweight and obese participants with T2DM (weight‐reducing phase only)
2 findings from 1 review