Will dietary supplements containing echinacea help me get over a cold faster?
Answers from Brent A. Bauer, M.D.
Maybe, but not by much. Recent research suggests that some echinacea supplements may shorten the duration of a cold by about half a day and may slightly reduce symptom severity. But these results were too minor to be deemed significant.
In the past, some studies have found echinacea to be helpful while other studies have found no benefit. Part of the problem is that echinacea products can contain different concentrations of the herb, and the echinacea extracts used in these products can come from the flowers, stems or roots of three different echinacea plant species. This makes it difficult to compare study results.
Echinacea generally doesn't cause problems for most people, but some people taking the herb have reported side effects such as stomach upset or diarrhea. Echinacea also has the potential to interact with other medications you might be taking, so talk with your doctor before using echinacea supplements.
Mar. 07, 2014
- Jawad M, et al. Safety and efficacy profile of Echinacea purpurea to prevent common cold episodes: A randomized double-blind, placebo-controlled trial. Evidence-Based Complementary and Alternative Medicine. 2012;2012:841315. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3457740/. Accessed Dec. 15, 2013.
- Echinacea. Natural Medicines Comprehensive Database. http://www.naturaldatabase.com. Accessed Dec. 15, 2013.
- Saper RB. Clinical use of echinacea. http://www.uptodate.com/home. Accessed Dec. 15, 2013.