Association between vitamin C intake and glioma risk: evidence from a meta-analysis

Neuroepidemiology. 2015;44(1):39-44. doi: 10.1159/000369814. Epub 2015 Feb 17.


Background: The field of quantifying the association between the intake of vitamin C and risk of glioma still has conflicts. Thus, we performed a comprehensive meta-analysis to test the hypothesis that a high intake of vitamin C may be a protective effect on glioma risk.

Methods: Pertinent studies were identified by a search in PubMed and Web of Knowledge up to June 2014. The random-effect model was used to combine study-specific results. Publication bias was estimated using Begg' funnel plot and Egger's regression asymmetry test.

Results: Thirteen articles with 15 studies (2 cohort study and 13 case-control studies) involving 3,409 glioma cases about vitamin C intake and glioma risk were used in this meta-analysis. The combined relative risks (RRs) of glioma associated with vitamin C intake was 0.86 (95% CIs = 0.75-0.99). Overall, significant protective associations were also found in the American population (RRs = 0.85, 95% CIs = 0.73-0.98) and case-control studies (RRs = 0.80, 95% CIs = 0.69-0.93). No publication bias was found.

Conclusions: Our analysis indicated that vitamin C intake might decrease the risk of glioma, especially among the Americans.

Publication types

  • Meta-Analysis

MeSH terms

  • Ascorbic Acid / administration & dosage*
  • Brain Neoplasms / epidemiology*
  • Brain Neoplasms / prevention & control
  • Diet*
  • Glioma / epidemiology*
  • Glioma / prevention & control
  • Humans
  • Risk


  • Ascorbic Acid