alexa Efficacy of COLD-fX in the prevention of respiratory symptoms in community-dwelling adults: a randomized, double-blinded, placebo controlled trial.
Microbiology

Microbiology

Journal of Antivirals & Antiretrovirals

Author(s): McElhaney JE, Goel V, Toane B, Hooten J, Shan JJ

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Abstract BACKGROUND: COLD-fX (CVT-E002), a proprietary extract of the roots of North American ginseng (Panax quinquefolium), rich in poly-furanosyl-pyranosyl-saccharides, has been found efficacious in the prevention of respiratory infections in institutionalized seniors and healthy adults. OBJECTIVE: We examined the efficacy of COLD-fX in the prevention of acute respiratory illness (ARI) in community dwelling seniors. DESIGN: This was a randomized, double-blind, placebo controlled trial. INTERVENTION: The participants were asked to take 2 capsules/day of either COLD-fX or placebo (200 mg/ capsule) for a period of 4 months. SUBJECTS: A total of 43 community-dwelling adults aged 65 years or older were recruited. Following one month of intervention, subjects were immunized with influenza vaccine. OUTCOME MEASURES: Subjects recorded the incidence and duration of respiratory symptoms during the study. They also recorded the incidence of adverse events during the study. RESULTS: The frequency and duration of ARI during the first two months of the study was found to be similar in the two groups. However, during the last 2 months (November and December) significantly fewer subjects in the COLD-fX group 32\% reported ARI compared to the placebo group 62\%. The duration of symptoms during the last 2 months was significantly shorter in the COLD-fX group than the placebo group (5.6 days in the COLD-fX group vs 12.6 days in the placebo group). There was no influenza illness circulating in the community during the period of the study. CONCLUSIONS: Ingestion of COLD-fX by immunocompetent seniors during an early "cold and flu" season reduced the relative risk and duration of respiratory symptoms by 48\% and 55\%, respectively. Daily COLD-fX administration can thus be a safe, natural therapeutic means for the prevention of ARI in healthy seniors. This article was published in J Altern Complement Med and referenced in Journal of Antivirals & Antiretrovirals

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