Pomegranate Products for Prevention of Common Cold and Influenza-Like Symptoms: A Double- Blind, Placebo-Controlled Randomized Clinical Trial
Pomegranate has a long history of use in folk medicine. Widely grown and consumed in most
countries, pomegranate fruit and its products are now being produced and used more
extensively in the US. The health benefits of pomegranate fruit and juice have been
substantiated by much research, including multiple studies that have shown the beneficial
antioxidative effects of pomegranate polyphenols (primarily ellagitannin punicalagin). Both
in vitro and in vivo studies have demonstrated that pomegranate products provide
hepatoprotection against toxins, reduce tumor cell growth, and have anti-angiogenesis,
immunomodulatory, and free-radical scavenging effects. Furthermore, both animal and clinical
studies indicate that pomegranate products can improve the blood lipid profile, reduce blood
pressure, enhance endothelial function, and provide anti-tumor and anti-atherosclerotic
activities.
No adverse events have been reported in clinical studies of more than 300 human subjects who
consumed 8 fluid ounces (oz) or more of POM Wonderful® (POM LLC, Los Angeles, CA)
pomegranate juice daily for periods as long as 3 years. These clinical trials have included
sensitive subpopulations, such as patients with atherosclerotic disease, diabetes,
hypertension, or prostate cancer. Moreover, no serious adverse effects have been reported in
human, animal and in vitro studies published to date.
Ex vivo laboratory studies have shown that pomegranate polyphenols have considerable
antioxidant activity. Because of the importance of oxidative stress in influenza infection
and its complications, we previously assessed the anti-influenza effects of pomegranate
products in ex vivo studies (See accompanying manuscript). Our laboratory findings showing
the anti-influenza, virucidal effects of pomegranate products led us to study their clinical
effects against influenza and the common cold in human volunteers. Previous studies have
shown the effects of natural products on the incidence and course of influenza infection.
The purpose of the current study was to assess the effect of a pomegranate concentrate (POM
Flu and Cold Formula, POM Wonderful LLC, Los Angeles, CA) in preventing the symptoms of
influenza and common cold during the influenza season. POM Flu and Cold Formula is intended
for oral use to provide supplemental antioxidants to a healthy population.
Interventional
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Caregiver, Investigator), Primary Purpose: Prevention
The primary outcome measure will be the incidence and severity of common cold using the modified severity scoring system during the sixteen week period of the POM Flu and Cold Formula use.
16 weeks
Yes
Mohammad Madjid, MD
Principal Investigator
Texas Heart Institute
United States: Institutional Review Board
POM001
NCT00617318
January 2007
June 2007
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