North American (Panax quinquefolius) and Asian Ginseng (Panax ginseng) Preparations for Prevention of the Common Cold in Healthy Adults: A Systematic Review
2011

Ginseng for Preventing Colds

Sample size: 747 publication 10 minutes Evidence: moderate

Author Information

Author(s): Jennifer Krebs Seida, Tamara Durec, Stefan Kuhle

Primary Institution: University of Alberta

Hypothesis

Does ginseng reduce the incidence of common colds in healthy adults?

Conclusion

Ginseng appears to shorten the duration of colds but does not significantly reduce the incidence of colds.

Supporting Evidence

  • Ginseng preparations significantly reduced the total number of common colds by 25% compared to placebo.
  • Ginseng shortened the duration of colds or ARIs by an average of 6.2 days.
  • Five trials involving 747 participants were included in the review.

Takeaway

Ginseng might help you get over a cold faster, but it doesn't really stop you from getting colds in the first place.

Methodology

The review included randomized controlled trials comparing ginseng to placebo in healthy adults.

Potential Biases

Potential bias due to varying quality of studies and funding sources.

Limitations

The methodological quality of the included studies varied widely, and many trials reported combined data for ARIs rather than colds specifically.

Participant Demographics

Participants were primarily healthy adults, with some studies including elderly populations.

Statistical Information

P-Value

0.04

Confidence Interval

95% CI: 5–45

Statistical Significance

p<0.05

Digital Object Identifier (DOI)

10.1093/ecam/nep068

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