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Vitamin C for preventing and treating the common cold

Overview of attention for article published in Cochrane database of systematic reviews, April 1998
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About this Attention Score

  • In the top 5% of all research outputs scored by Altmetric
  • High Attention Score compared to outputs of the same age (99th percentile)
  • High Attention Score compared to outputs of the same age and source (99th percentile)

Mentioned by

news
13 news outlets
blogs
1 blog
twitter
148 tweeters
facebook
8 Facebook pages
video
2 video uploaders

Citations

dimensions_citation
17 Dimensions

Readers on

mendeley
58 Mendeley
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Title
Vitamin C for preventing and treating the common cold
Published in
Cochrane database of systematic reviews, April 1998
DOI 10.1002/14651858.cd000980
Pubmed ID
Authors

Douglas, RM, Chalker, EB, Treacy, B

Abstract

The role of oral ascorbic acid (vitamin C) in the prevention and treatment of colds remains controversial despite many controlled trials. There have also been a number of efforts to synthesize and/or overview the results of these trials, and controversy over what these overviews tell us. The objective of this review was to answer the following two questions: (1) Does regular high dosage supplementation with vitamin C reduce the incidence of colds? (2) Does taking vitamin C in high doses at the onset of a cold have a therapeutic effect? This review currently deals only with published trials from two previously published reviews by Kleijnen 1989 and Hemila 1992. Randomised and non-randomised trials of vitamin C taken to prevent or treat the common cold. Two reviewers independently extracted data and assessed trial quality. Thirty trials were included. The quality of the included trials was variable. Vitamin C in doses as high as one gram daily for several winter months, had no consistent beneficial effect on incidence of the common cold. For both preventive and therapeutic trials, there was a consistently beneficial but generally modest therapeutic effect on duration of cold symptoms. This effect was variable, ranging from -0.07% to a 39% reduction in symptom days. The weighted difference across all of the studies revealed a reduction of a little less than half a symptom day per cold episode, representing an 8% to 9% reduction in symptom days. There was no clear indication of the relative benefits of different regimes or vitamin C doses. However in trials that tested vitamin C after cold symptoms occurred, there was some evidence that a large dose produced greater benefits than lower doses. Long term daily supplementation with vitamin C in large doses daily does not appear to prevent colds. There appears to be a modest benefit in reducing duration of cold symptoms from ingestion of relatively high doses of vitamin C. The relation of dose to therapeutic benefit needs further exploration.

Twitter Demographics

The data shown below were collected from the profiles of 148 tweeters who shared this research output. Click here to find out more about how the information was compiled.

Mendeley readers

The data shown below were compiled from readership statistics for 58 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
United Kingdom 1 2%
Unknown 57 98%

Demographic breakdown

Readers by professional status Count As %
Student > Bachelor 11 19%
Other 9 16%
Researcher 8 14%
Student > Master 7 12%
Librarian 4 7%
Other 7 12%
Unknown 12 21%
Readers by discipline Count As %
Medicine and Dentistry 13 22%
Agricultural and Biological Sciences 10 17%
Pharmacology, Toxicology and Pharmaceutical Science 5 9%
Biochemistry, Genetics and Molecular Biology 4 7%
Nursing and Health Professions 3 5%
Other 10 17%
Unknown 13 22%

Attention Score in Context

This research output has an Altmetric Attention Score of 221. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 30 May 2020.
All research outputs
#77,482
of 15,569,511 outputs
Outputs from Cochrane database of systematic reviews
#151
of 11,217 outputs
Outputs of similar age
#352
of 126,207 outputs
Outputs of similar age from Cochrane database of systematic reviews
#1
of 124 outputs
Altmetric has tracked 15,569,511 research outputs across all sources so far. Compared to these this one has done particularly well and is in the 99th percentile: it's in the top 5% of all research outputs ever tracked by Altmetric.
So far Altmetric has tracked 11,217 research outputs from this source. They typically receive a lot more attention than average, with a mean Attention Score of 23.1. This one has done particularly well, scoring higher than 98% of its peers.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 126,207 tracked outputs that were published within six weeks on either side of this one in any source. This one has done particularly well, scoring higher than 99% of its contemporaries.
We're also able to compare this research output to 124 others from the same source and published within six weeks on either side of this one. This one has done particularly well, scoring higher than 99% of its contemporaries.