In research published in the October 25 2005 issue of the Canadian Medical Association Journal Gerald N. Predy and colleagues from the University of Alberta and the University of Western Ontario found that administering an extract of North American ginseng root to adults with a history of frequent upper respiratory tract infections cut cold incidence as well as lowered cold symptoms and duration.
In a randomized, double-blind trial, 130 men and women received 2 capsules per day of a poly-furanosyl-pyranosyl-saccharide-rich extract of North American ginseng for a four month period while 149 received a placebo. Similar extracts have been shown in prior research to enhance lymphocyte function and immune response. Participants in the study were instructed to complete daily logs to document and rate cold symptoms.
At the study’s completion, it was found that the group who received the ginseng extract experienced fewer colds than the placebo group. Ten percent of those who received ginseng reported having two or more colds during the study period compared to 22.8 percent of those who received placebos. Cold sufferers in the ginseng group experienced an average cold duration of 8.7 days versus 11.1 days among those who did not receive ginseng. Symptoms were also rated as less severe by the ginseng group.
Although the study was not designed to distinguish influenza from the common cold, the authors observed that the results obtained for ginseng extract in this study are comparable to those obtained with many common antiviral drugs such as rimantadine or zanamivir for influenza. While these antiviral drugs have been reported to reduce the duration of illness by 1.5 to 2.5 days, ginseng extract reduced cold duration by 2.4 days. Another advantage of ginseng is its potential effectiveness against a broader range of viruses. The authors conclude that North American ginseng extract is “an attractive natural prophylactic treatment for upper respiratory infections.”
The common cold is caused by more than 300 serologically distinct viruses. Since there are so many different types, it is impossible to develop a single vaccine effective against them all.
A randomized, double-blind, placebo-controlled clinical trial has shown that zinc gluconate lozenges produce a reduction in the duration of cold symptoms. In this study, patients received zinc lozenges or placebo lozenges every 2 hours for the duration of cold symptoms. The median time to complete resolution of cold symptoms was 4.4 days in the zinc group, compared with 7.6 days in the placebo group (Anon. 1997).
Another study to test the benefits of zinc gluconate lozenges showed that the time to complete resolution of symptoms was significantly shorter in the zinc group than in the placebo group. The zinc group had significantly fewer days with coughing, headache, hoarseness, nasal congestion, nasal drainage, and sore throat (Mossad et al. 1996). By dissolving two zinc lozenges in the mouth every few hours, the zinc will help inactivate cold viruses multiplying in the throat.
Scientific research shows that garlic is a source of phytochemicals that protects against infection and inflammation, lowers the risk of heart disease, and has anticancer effects. Garlic is rich in antioxidants that include organosulfur compounds and flavonoids, capable of scavenging free radicals. Garlic also contains selenium, which is required for the antioxidant enzyme glutathione peroxidase. These properties help to enhance the immune system in fighting off infections caused by bacteria, viruses, and fungi.
Human studies (Abdullah 1989) confirm immune stimulation by garlic. Subjects receiving aged garlic extract at 1800 mg a day for 3 weeks showed a 155.5% increase in immune cell activity. Garlic and garlic preparations increase the activity of immune cells, including macrophages that kill infectious invaders.
Zinc is a mineral essential for formation of superoxide dismutase, one of the body’s most important free radical scavengers and one that cannot be directly supplemented. Zinc also promotes wound healing, immune function, taste sensitivity, protein synthesis, insulin production, and reproduction including organ development and sperm motility.
Sports Ginseng is the highest quality and most effective form of ginseng for athletes who train and compete at peak levels, and for active men and women of all ages in search of good health and vibrant energy.* Sports Ginseng is standardized with naturally balanced concentrations of active and co-active constituents, including ginsenosides, panaxosides, eleutherosides, and Rg and Rb factors, while retaining and enhancing all the whole root synergistic benefits that are so significant in natural herbs.
To all Life Extension Update subscribers:
We apologize for the delay in sending this issue of Life Extension Update. As most of you know, South Florida is in the process of cleaning up after Hurricane Wilma. We thank you for your patience during this time.
If you have questions or comments concerning this issue or past issues of Life Extension Update, send them to email@example.com or call 954 202 7716.
This supplement should be taken in conjunction with a healthy diet and regular exercise program. Individual results are not guaranteed and results may vary.
The information provided on this site is for informational purposes only and is not intended as a substitute for advice from your physician or other health care professional or any information contained on or in any product label or packaging. You should not use the information on this site for diagnosis or treatment of any health problem or for prescription of any medication or other treatment. You should consult with a healthcare professional before starting any diet, exercise or supplementation program, before taking any medication, or if you have or suspect you might have a health problem. You should not stop taking any medication without first consulting your physician.
If you are not 100% satisfied with any purchase made directly from Life Extension®, just return your purchase within 12 months of original purchase date and we will either replace the product for you, credit your original payment method or credit your Life Extension account for the full amount of the original purchase price (less shipping and handling).
These statements have not been evaluated by the Food and Drug Administration.
These products are not intended to diagnose, treat, cure, or prevent any disease.