The number of participants reporting cold episodes was just 7 in the vitamin C group, compared to 11 in the placebo group, during the 8 week trial representing a risk reduction of 45% in the vitamin C group. Last, but not least, take some Vitamin C. Paperback editions were issued in 1971 and 1973, and Pauling subsequently authored several related books: Vitamin C and Cancer 1979 and 1986. Severe vitamin C deficiency can lead to a disease characterized by anemia, bleeding gums, bruising and poor wound healing scurvy. The first survey for the common cold was conducted during January—March 1997. Citrus fruits, red and green peppers, watermelon, and leafy greens are among the best sources of vitamin C. Results: Total number of common colds per 1000 person-months was 21.
The number of common colds i. In addition to possessing excellent antioxidant activity, these extracts have been shown to improve blood flow to the retina and enhance visual processes, especially poor night vision. No statistically significant difference between groups was observed in the severity of the cold or each symptom. All assays were conducted by persons who were blinded to the intervention assignment and the questionnaire data. A large analysis of previous studies on the possible protective effects of vitamin C, published in the Cochrane Database of Systematic Reviews in 2013, included studies that involved the use of at least 200 milligrams of vitamin C taken daily as either a preventative measure or treatment for the common cold. In the morning my hives were gone… just light pink spots remaining where the previous night there had been red welts. In fact, people in this category cut the incidence of colds by 50 percent by taking a daily dose of vitamin C.
Advice from other commenters on this website is not a substitute for medical attention. Side effects tend to be dose-related. Although the subjects were randomized to each group and data were analyzed by considering several factors, the effect of unmeasured factors such as physical and psychologic stress may be important in evaluating the role of vitamin C on the common cold ;. Five key nutrients for preventing and treating cataracts and macular degeneration Nutritional factors play a key role in the prevention and treatment of cataracts and macular degeneration. Vitamin C and the common cold are linked only by means of reducing the severity and duration of cold, not preventing and treating cold. Self-dosing of vitamin C must be started as soon as possible after the onset of common cold symptoms to be most effective. Target subjects were men and women aged 40—69 years living in four municipalities of the Yokote Public Health Center District in the Akita prefecture, a region in Japan with one of the highest mortality rates from gastric cancer.
By the mid-1970s, an estimated 50 million Americans were using vitamin C to treat colds, and drugstore sales of vitamin C products had quadrupled. Green tea provides about the same amount per 4-oz. Harri Hemilä is a professor of public health at the University of Helsinki. But is this practice grounded in science, or popular culture? The discovery of interferon was reported in 1957 by Isaacs and Lindenmann. When subjects reported one or more episodes of the common cold, they were asked about the duration and severity of specific symptoms for the most severe cold.
The major side effect of vitamin C overload is an unmistakable diarrhea. This indicates absolute saturation, and the daily dose is then dropped to the highest amount that will not bring about diarrhea. Supplementation of β-carotene was stopped, but the prescription of vitamin C was continued for 5 years. Even if you choose not to take a vitamin supplement, you should make an effort to consume foods that contain ascorbic acid. Common cold survey Episodes of the common cold were surveyed during the supplementation period from years 2 to 5 and 1 year after the intervention was completed. They noted that this may be because of the antihistamine effect of the high-dose supplement. The intakes of vitamin C required to prevent colds are often misunderstood.
After Pauling's book, a number of controlled trials were carried out. No consistent effect of vitamin C was seen on the duration or severity of colds in the therapeutic trials. However, the protocol amendment cessation of β-carotene supplementation and change in the end point from gastric cancer incidence to biomarkers is not directly related to respiratory disease, including the common cold, or interest in vitamin C. Most recently two years ago I began it again right after moving to my new home. Numerous intervention studies have investigated the relationship between vitamin C supplementation and the incidence of common cold episodes. In addition to being found naturally in many foods, such as citrus fruits, tomatoes, and broccoli, it is widely available as a dietary supplement. One gram of vitamin C is not a large dose.
They do not protect against getting a cold. But we have a question for all the naysayers. Get adequate sleep, drink fluids, eat nutritious meals, and manage stress — all of these habits contribute to long-term good health and proper immune functioning. Intervention: Daily vitamin C supplementation of 50 mg low-dose group or 500 mg high-dose group. The exclusion of trials that were either not randomised or not double- blind had no effect on the conclusions.
However, evidence suggested no reduction of incidences of cold among the general population. Unless you can provide supporting information for your recollection, I hope that the Graedons or other informed sources will provide accurate information here. Evidence conducted over several decades suggested no attenuation of cold symptoms i. Since those test results many years ago our family still believes in the overall benefits that Vitamin C can do. Imagine someone rejecting penicillin on the grounds that it did not cure every infection. That vitamin C is good for you is not unfounded.