References:

1. Goel DP, et al. 2004. Doping-control urinalysis of a ginseng extract, Cold-FX®, in athletes. International Journal of Sport Nutrition and Exercise Metabolism Aug; 14: 1-8.
   
2. Holt, A & Shan, J. 2005. Inhibition of human hepatic cytochrome P450 enzymes by COLD-FX and REMEMBER-FX® - proprietary extracts of North American ginseng (Panax Quinquefolium). Journal of Complementary and Integrative Medicine 2(1) (3): 28.
   
3. McElhaney J, et al. 2004. A placebo-controlled trial of a proprietary extract of North American Ginseng (CVT-E002) to prevent acute respiratory illness in institutionalized older adults. Journal of the American Geriatrics Society 52: 13-19.
   
4. McElhaney J, et al. 2006. Efficacy of COLD-FX in the prevention of respiratory symptoms in community-dwelling adults: a randomized, double-blinded, placebo controlled trial. Journal of Alternative and Complementary Medicine 12(2):153-157.
   
5. Predy G, et al. 2005. Efficacy of an extract of North American ginseng containing poly-furanosyl-pyranosyl-saccarides for preventing upper respiratory tract infections: a randomized controlled trial. Canadian Medical Association Journal. 173(9): 1043-1048.
   
6. Predy G, et al. 2006. Immune Modulating Effects of Daily Supplementation of COLD-FX (a Proprietary Extract of North American Ginseng) in Healthy Adults.Journal of Clinical Biochemistry and Nutrition 39: 162-167.
   
7. Ueng Y & Chen C. 2002. Effects of CVT-E002, a proprietary extract from North American ginseng (Panax Quinquefolium) on Drug-metabolizing Enzymes, Journal of Chinese Medicine 13: 89-96.
   
8. Wang M, et al. 2001. Immunomodulating activity of CVT-E002, a proprietary extract from North American ginseng (Panax quinquefolium). Journal of Pharmacy and Pharmacology 53 (11): 1515-23.
   
9. Wang M, et al. 2004. A proprietary extract from North American ginseng (Panax quinquefolium) enhances IL-2 and IFN-gamma productions in murine spleen cells induced by Con-A. International Immunopharmacology. 4(2):311-5.
   
10. Yang JC et al. Effect of American Ginseng Extract (Panax quinquefolius) on Formalin-Induced Nociception in Mice American Journal of Chinese Medicine 29(1): 149-154.
 
   
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