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American Ginseng 

Literature Summary:  American Ginseng may be useful to improve fatigue, especially in people with chronic illness. (1) It may also improve short term memory, accuracy and response time. May improve short term memory in patients with alzeihmers disease and schizophrenia. (2,3) May prevent respiratory infections and reduce incidence. A review of five trials of 747 subjects found that American ginseng reduced the incidence of colds and flu by 25% compared to placebo. (4,5)


  • Barton DL, Liu H, Dakhil SR, et al. Wisconsin Ginseng (Panax quinquefolius) to improve cancer-related fatigue: a randomized, double-blind trial, N07C2. J Natl Cancer Inst. 2013;105:1230-8. 
  • 2. Lee, S. T., Chu, K., Sim, J. Y., Heo, J. H., and Kim, M. Panax ginseng enhances cognitive performance in Alzheimer disease. Alzheimer Dis.Assoc.Disord. 2008;22:222-226.
  • 3. Chen EY, Hui CL. HT1001, a proprietary North American ginseng extract, improves working memory in schizophrenia: a double-blind, placebo-controlled study. Phytother Res. 2012;26:1166-72
  • 4. Seida JK., Durec T., Kuhle S. North American (Panax quinquefolius) and Asian Ginseng (Panax ginseng) Preparations for Prevention of the Common Cold in Healthy Adults: A Systematic Review. Evidence-Based Complementary and Alternative Medicine . 2011; ID2822151
  • 5. McElhaney JE, Simor AE, McNeil S, Predy GN. Efficacy and safety of CVT-E002, a proprietary extract of panax quinquefolius in the prevention of respiratory infections in influenza-vaccinated community-dwelling adults: a multicenter, randomized, double-blind, and placebo-controlled trial. Influenza Res Treat 2011;2011:759051