Older nursing home residents, 90% of whom had received the current ‘flu vaccine, who received an extract of American ginseng (Panax quinquefolium L.) in the form of the proprietary product Cold-FX, were 86% less likely to contract influenza than those who receive a placebo. (Journal of the American Geriatrics Society, Vol. 52, January 2004, pp. 13-19).
Quelle: www.jcm.co.uk