Vitamin E supplementation and mortality in healthy people: a meta-analysis of randomised controlled trials

Andrea Jane Curtis, Michael Bullen, Loretta Piccenna, John James McNeil

Research output: Contribution to journalArticleResearchpeer-review

16 Citations (Scopus)

Abstract

Abstract Purpose To evaluate the effect of oral vitamin E supplementation on all-cause mortality in apparently healthy people. Methods A systematic review and meta-analysis was conducted on randomised controlled trials (RCTs) with =6 months of follow up investigating the effect of vitamin E supplementation on healthy adults in developed countries. Electronic databases (MEDLINE, EMBASE, and Cochrane Central Register of Controlled Trials) and reference lists of trial reports were searched for RCTs published between 1966 and June 2012. Three investigators assessed eligibility of identified trials. Disagreements were resolved by consensus. Two investigators independently extracted data according to the criteria. Results There were 18 RCTs identified with 142,219 apparently healthy participants (71,116 in vitamin E intervention groups and 71,103 in control groups) that were included in the final analysis. Fixed effect and random effects analysis of the 18 trials revealed that supplementation with vitamin E was not associated with all-cause mortality (relative risk 1.01, 95 confidence interval 0.97 ? 1.05, p?=?0.65). Subgroup analyses by type of vitamin E (natural or synthetic), dose or duration of exposure, study design or quality, and pre-specified mortality outcome showed no association with all-cause mortality. Conclusions The evidence from pooled analysis of 18 randomised controlled trials undertaken in apparently healthy people shows no effect of vitamin E supplementation at a dose of 23?800 IU/day on all-cause mortality.
Original languageEnglish
Pages (from-to)563 - 573
Number of pages11
JournalCardiovascular Drugs and Therapy
Volume28
Issue number6
DOIs
Publication statusPublished - 2014

Cite this

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title = "Vitamin E supplementation and mortality in healthy people: a meta-analysis of randomised controlled trials",
abstract = "Abstract Purpose To evaluate the effect of oral vitamin E supplementation on all-cause mortality in apparently healthy people. Methods A systematic review and meta-analysis was conducted on randomised controlled trials (RCTs) with =6 months of follow up investigating the effect of vitamin E supplementation on healthy adults in developed countries. Electronic databases (MEDLINE, EMBASE, and Cochrane Central Register of Controlled Trials) and reference lists of trial reports were searched for RCTs published between 1966 and June 2012. Three investigators assessed eligibility of identified trials. Disagreements were resolved by consensus. Two investigators independently extracted data according to the criteria. Results There were 18 RCTs identified with 142,219 apparently healthy participants (71,116 in vitamin E intervention groups and 71,103 in control groups) that were included in the final analysis. Fixed effect and random effects analysis of the 18 trials revealed that supplementation with vitamin E was not associated with all-cause mortality (relative risk 1.01, 95 confidence interval 0.97 ? 1.05, p?=?0.65). Subgroup analyses by type of vitamin E (natural or synthetic), dose or duration of exposure, study design or quality, and pre-specified mortality outcome showed no association with all-cause mortality. Conclusions The evidence from pooled analysis of 18 randomised controlled trials undertaken in apparently healthy people shows no effect of vitamin E supplementation at a dose of 23?800 IU/day on all-cause mortality.",
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Vitamin E supplementation and mortality in healthy people: a meta-analysis of randomised controlled trials. / Curtis, Andrea Jane; Bullen, Michael; Piccenna, Loretta; McNeil, John James.

In: Cardiovascular Drugs and Therapy, Vol. 28, No. 6, 2014, p. 563 - 573.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Vitamin E supplementation and mortality in healthy people: a meta-analysis of randomised controlled trials

AU - Curtis, Andrea Jane

AU - Bullen, Michael

AU - Piccenna, Loretta

AU - McNeil, John James

PY - 2014

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N2 - Abstract Purpose To evaluate the effect of oral vitamin E supplementation on all-cause mortality in apparently healthy people. Methods A systematic review and meta-analysis was conducted on randomised controlled trials (RCTs) with =6 months of follow up investigating the effect of vitamin E supplementation on healthy adults in developed countries. Electronic databases (MEDLINE, EMBASE, and Cochrane Central Register of Controlled Trials) and reference lists of trial reports were searched for RCTs published between 1966 and June 2012. Three investigators assessed eligibility of identified trials. Disagreements were resolved by consensus. Two investigators independently extracted data according to the criteria. Results There were 18 RCTs identified with 142,219 apparently healthy participants (71,116 in vitamin E intervention groups and 71,103 in control groups) that were included in the final analysis. Fixed effect and random effects analysis of the 18 trials revealed that supplementation with vitamin E was not associated with all-cause mortality (relative risk 1.01, 95 confidence interval 0.97 ? 1.05, p?=?0.65). Subgroup analyses by type of vitamin E (natural or synthetic), dose or duration of exposure, study design or quality, and pre-specified mortality outcome showed no association with all-cause mortality. Conclusions The evidence from pooled analysis of 18 randomised controlled trials undertaken in apparently healthy people shows no effect of vitamin E supplementation at a dose of 23?800 IU/day on all-cause mortality.

AB - Abstract Purpose To evaluate the effect of oral vitamin E supplementation on all-cause mortality in apparently healthy people. Methods A systematic review and meta-analysis was conducted on randomised controlled trials (RCTs) with =6 months of follow up investigating the effect of vitamin E supplementation on healthy adults in developed countries. Electronic databases (MEDLINE, EMBASE, and Cochrane Central Register of Controlled Trials) and reference lists of trial reports were searched for RCTs published between 1966 and June 2012. Three investigators assessed eligibility of identified trials. Disagreements were resolved by consensus. Two investigators independently extracted data according to the criteria. Results There were 18 RCTs identified with 142,219 apparently healthy participants (71,116 in vitamin E intervention groups and 71,103 in control groups) that were included in the final analysis. Fixed effect and random effects analysis of the 18 trials revealed that supplementation with vitamin E was not associated with all-cause mortality (relative risk 1.01, 95 confidence interval 0.97 ? 1.05, p?=?0.65). Subgroup analyses by type of vitamin E (natural or synthetic), dose or duration of exposure, study design or quality, and pre-specified mortality outcome showed no association with all-cause mortality. Conclusions The evidence from pooled analysis of 18 randomised controlled trials undertaken in apparently healthy people shows no effect of vitamin E supplementation at a dose of 23?800 IU/day on all-cause mortality.

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