Cold and Flu Advice
The normal duration for a cold is 3-7 days, with symptoms occurring up to 10 days (1). For influenza infection, the duration and symptoms are much more variable, duration lasting 7-14 days and symptoms lasting up to four weeks. If cold or flu symptoms last longer than the above times, a person may have contracted an opportunistic bacterial infection, and should notify their physician. There are over 200 viral strains that can cause colds and influenza (1), so vaccines have not been very successful, since they can often only target one strain at a time. If you have a fever, or your mucus is dark yellow, green or brown, notify your physician. Everyone with a cold or flu infection should drink plenty of spring water, at least six glasses (48 oz.) per day.
Influenza and pneumonia together have been the in the top 10 killers of Americans for at least the last 100 years. Around 20,000 people die either directly or indirectly from the influenza virus. There is a lot of hype about the Swine flu virus lately, but as of this writing, the deaths caused in America by this particular strain of virus are more than 100 times less than the average influenza death rate for all strains combined. Sometimes viruses cross the species barrier and infect other species that they normally cannot infect: this is true for the Human Immunodeficiency Virus (HIV), which once only infected monkeys as the Simian Immunodeficiency Virus (SIV). Fortunately, unlike HIV, the Swine Flu virus and similar viral strains infect humans too quickly to keep any infection momentum, and will burn themselves out before long.
For the common cold, there are a number of different treatments. Antihistamines are effective in reducing symptoms, but have side effects such as drowsiness. One study found that driving after taking the first-generation antihistamine Diphenhydramine (Benadryl) can cause impairment equivalent to driving drunk (2). Anticholinergics (ex. nasal sprays) can also help cold symptoms, and the side effects are relatively mild (3). Alpha-adrenergic agonists (stimulants) are powerful decongestants, but their constant use can lead to drug tolerance, where withdrawal of the decongestant can lead to even worse congestion. Tylenol, aspirin, and non-steroidal anti-inflammatories (NSAIDS) such as Ibuprofen can actually worsen common cold symptoms (4).
The reason why hot chicken soup may be helpful for colds is because it helps mucus flow out of the sinus and respiratory system (5). Some people use cayenne pepper to help clear their sinuses. Small amounts should be fine for this use, as long as someone is not allergic to the peppers. Steam inhalation to reduce cold symptoms gives inconsistent results (6). However, drinking plenty of water is always a good idea when someone has a cold or the flu. Adequate hydration thins out the mucus and helps clear the virus from the sinuses. There is some evidence that bovine colostrum reduces the incidence of upper respiratory tract infections, such as the cold and flu (7). Bovine colostrum is the pre-milk produced from a cow that has just given birth. Pregnant and nursing women should not take this supplement, nor should anyone with cancer or with a high risk of developing cancer.
There are a few different medications now to reduce the duration and severity of influenza. However, these drugs have side effects, including difficulty concentrating, insomnia, and dizziness (2). If someone decides to get a flu shot, they should demand information about whether the vaccine contains thimerosal or not. Thimerosal is a vaccine preservative that contains 50% mercury. Mercury is a well-known neurotoxin, among other things. Some people like to take antibiotics whenever they feel ill. However, antibiotics kill only bacteria, not viruses. And yet 60% of patients with common cold symptoms received an antibiotic at the clinic anyway (8).
Vitamin C and Zinc are highly recommended to help prevent colds and flu. There is more mixed evidence about whether these two supplements actually decrease the duration and severity of colds and flu. Some practitioners recommend megadosing with vitamin A, often 50,000-100,000 IU/day, but this amount can be toxic to some people, especially if they have any liver conditions. If someone wants to megadose safely with vitamin A, they should consider using the much safer beta-carotene instead, since it is converted to vitamin A in the intestines as needed. Heavy smokers and drinkers should notify their physician before megadosing with beta-carotene.
There is not consistent evidence that supplementing with vitamin C significantly reduces the incidence of the common cold (9). There are, however, isolated studies that do find some reduction in cold incidence. When study subjects took 0.6-1 gram of vitamin C every day, there was a considerable reduction in common cold incidence (10). Between 1971 and 1994, 21 different studies were performed that attempted to determine if vitamin C helped fight off colds or not. All 21 studies showed that vitamin C supplementation reduced the duration of the common cold, and its severity was reduced by an average of 23% (11). However, there was no reduction in the incidence of the common cold with vitamin C supplementation.
Zinc gluconate, ascorbate, glycinate, and acetate are much more effective against colds and flu than zinc citrate or tartrate (12). It appears that zinc gluconate lozenges that are unflavored, with no additional additives (ex. citrate), may be more effective against the common cold than flavored zinc lozenges (13). One of the side effects of zinc overdose may be loss of taste and/or smell, so do not supplement with more than 80 mg/day of zinc for more than a week at a time, and no more than 50 mg/day of zinc between cold or flu infections. As you have read, there are many different natural remedies for cold and flu infections. However, the key is to help prevent cold and flu viruses from gaining a foothold in your respiratory system, by exercising, eating healthy, minimizing stress, and taking the proper immune-boosting supplements.
References:
1. Balch, P. Prescription for Nutritional Healing, 3rd Ed. Avery Books/Penguin Putnam Inc., 2000.
2. Litin, S., ed. Mayo Clinic Family Health Book, 3rd Ed. New York, NY: HarperCollins Books, 2003.
3. Hayden, FG, Diamond, L, Wood, PB, Korts, DC, & Wecker, MT. (1996). Effectiveness and safety of intranasal ipratropium bromide in common colds: a randomized, double-blind, placebo-controlled trial. Annals of Internal Medicine, 125: 89-97.
4. Graham, NMH, Burrel, CJ, Douglas, RM, Debelle, P, & Davies, L. (1990). Adverse effects of aspirin, acetaminophen, and ibuprofen on immune function, viral shedding, and clinical status in rhinovirus-infected volunteers. J Infect Dis, 162: 1277-1282.
5. Feinstein, A. Healing with vitamins. Emmaus, PA: Rodale Books, Inc., 1996.
6. Forstall, GJ, MacKnin, ML, Yen-Lieberman, B, & Medendorp, SV. (1994). Effect of inhaling heated vapor on symptoms of the common cold. JAMA, 271: 1109-1111.
7. Brinkworth, G., & Buckley, J. (2003). Concentrated bovine colostrums protein supplementation reduces the incidence of self-reported symptoms of upper respiratory tract infection in adult males. European Journal of Nutrition, Vol. 42(4): 228-232.
8. Mainous III, AG, Hueston, WJ, & Clark, JR. (1996). Antibiotics and upper respiratory infection: do some folks think there is a cure for the common cold? J Fam Pract, 42: 357-361.
9. Reavley, N. The New Encyclopedia of Vitamins, Minerals, Supplements, and Herbs. New York, NY: M. Evan & Co., 1998.
10. Hemila, H., (1996). Vitamin C and common cold incidence; a review of studies with subjects under heavy physical stress. Int J Sports Med, Jul 17(5): 379-383.
11. Hemila, H. (1994). Does vitamin C alleviate the symptoms of the common cold?—A review of current evidence. Scandinavian Journal of Infectious Diseases, 26(1): 1-6.
12. Mossad, SB, MacKnin, ML, Medendorp, SV, & Mason, P. (1996). Zinc gluconate lozenges for treating the common cold. A randomized, double-blind, placebo-controlled study. Annals of Internal Medicine, 125(2): 81-88.
13. Eby, G. (1998). Where’s the bias? Annals of Internal Medicine, 128(1): 75.
About the Author
Dr. Jensen is both a consultant and author in the BioMedical and Nutrition fields. He has previously written a book on both topics, The Failures of American Medicine, published in 2002. Dr. Jensen has also written a doctoral dissertation on how Vitamin C can reduce stress and allergies via its antihistamine effect. He has worked in a broad range of BioMedical fields, such as gene regulation, cancer research, and HIV vaccine development. However, Dr. Jensen eventually decided that helping people more directly would be more rewarding for everyone involved. He has since helped clients with dozens of different ailments. Dr. Jensen is a practitioner in the field of Metabolic Typing, which characterizes different biochemistries among people based on certain physical and behavioral traits they have.
You can contact Dr. Jensen at 1-800-390-5365, or mail him at drjensen@individualizednutrition.com.
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