Wikipedia
Cold-fX is a product derived from the roots of North American ginseng ( Panax quinquefolius). It was formulated by Jacqueline Shan and originally manufactured by her company, Afexa Life Sciences Inc. (formerly called CV Technologies Inc.). It was headquartered in Edmonton, Alberta, Canada and subsequently, the company and lead product was acquired by Valeant Pharmaceuticals International (headquartered in Laval, Quebec, Canada) in 2011.
There is little evidence to support that Cold-fX is effective in the common cold. All trials have been done by the manufacturer and there has been poor data reporting. According to Health Canada's Natural Health Product Directorate records, Cold-FX claims to "help reduce the frequency, severity and duration of cold and flu symptoms by boosting the immune system".