Hi Bhavna, heaps of articles and easy to find. Check out some of the references below. Cheers, Leanne

Vitamin C and the common cold

H Hemilä - British Journal of Nutrition, 1992 - Cambridge Univ Press

Vitamin C supplementation reduces the incidence of postrace symptoms of upper-respiratory-tract infection in ultramarathon runners.

EM Peters, JM Goetzsche, B Grobbelaar… - The American journal …, 1993 - Am Soc Nutrition

Immune-enhancing role of vitamin C and zinc and effect on clinical conditions

ES Wintergerst, S Maggini, DH Hornig - Annals of Nutrition and …, 2006 - karger.com

Evaluation of the efficacy of ascorbic acid in prophylaxis of induced rhinovirus 44 infection in man

AR Schwartz, Y Togo, RB Hornick… - Journal of Infectious …, 1973 - jid.oxfordjournals.org

Vitamin C supplementation and common cold symptoms: problems with inaccurate reviews

H Hemilä - Nutrition, 1996 - Elsevier

KA Mink, EC Dick, LC Jennings, SL Inhorn; Amelioration of rhinovirus colds

by vitamin C supplementation. Med Virology, 7 (1988), p. 356. ...

Does vitamin C alleviate the symptoms of the common cold?-a review of current evidence

H Hemilä - Scandinavian journal of infectious diseases, 1994 - Taylor & Francis

Consumption of fresh fruit rich in vitamin C and wheezing symptoms in children

F Forastiere, R Pistelli, P Sestini, C Fortes, E Renzoni… - Thorax, 2000 - thorax.bmj.com

thank you for your help.

but i need specific articles that are RCT based, on vitamin c for treatment of cold, NOT on prophylactic treatment.

and few articles i cannot access them as it ask me to purchase it.

What are the articles you are having trouble accessing that you want? Can you not get them through your university? I might be able to find them for you if you send the refs?

Can Vitamin C Prevent or Treat Cold Symptoms?

Vitamin C has been studied for many years as a possible treatment for colds, or as a way to help prevent colds. But findings have been inconsistent. Overall, experts have found little to no benefit from vitamin C for preventing or treating the common cold.

In a July 2007 study, researchers wanted to discover whether taking 200 milligrams or more of vitamin C daily could reduce the frequency, duration, or severity of a cold. After reviewing 60 years of clinical research, they found that when taken after a cold start, vitamin C supplements do not make a cold shorter or less severe. When taken daily, vitamin C very slightly shorted cold duration -- by 8% in adults and by 14% in children.

So what does all this mean?

According to this research, the average adult who suffers from a cold for 12 days a year would still suffer for about 11 days a year if that person took a high dose of vitamin C every day during that year.

For the average child who suffers about 28 days of cold illness a year, taking daily high-dose vitamin C would still likely mean about 24 days of cold illness.

When vitamin C was tested for treatment of colds in 7 separate studies, it was found to be no more effective than placebo at shortening the duration of cold symptoms.

http://www.webmd.com/cold-and-flu/cold-guide/vitamin-c-for-common-cold

Mr. Pauling wrote a lot about the benefits of vit C, maybe checking his book will give you some idea behind vit C supplementation and possible implications.

Regards,

Karlo

http://www.amazon.com/How-Live-Longer-Feel-Better/dp/0870710966

Thank you Friends, I have managed to complete my assignment.

Vitamin C and colds

Despite the popular belief that vitamin C can cure the common cold, research about this claim is conflicting.

Large doses of vitamin C may help reduce how long a cold lasts, but they do not appear to protect against getting a cold. This is true even after being exposed to the virus that causes colds.

Taking a vitamin C supplement may help treat a cold only if your body currently has low levels of this vitamin. For example, people who live in cold climates may have low levels of vitamin C, so taking a vitamin C supplement may help keep this group of people from getting colds. This is also true for people who routinely do vigorous exercise, such as running marathons.

The likelihood of success may vary from person to person. Some people improve, while others do not. People with kidney disease should not take vitamin C supplements.

Taking more than 500 milligrams (mg) of vitamin C at any one time is not helpful. More than that amount is simply lost by our body not absorbing it all or through urination.

Most experts advise that you should eat a balanced diet to get your daily vitamin and mineral requirements.

https://www.nlm.nih.gov/medlineplus/ency/article/002145.htm

It may help but not recover from common cold

• Caution taking it with hot drinks; vit C is confirmed to be thermolabile!

Stress might induce 'cold' via a change in the immune system functioning. Vitamine C taken during certain periods of the day might hamper sleep and therefore might increase immune system changes inducing cold?

Peppermint oil and pure menthol are often included in commercial products such as nasal decongestants, throat lozenges, cough drops, chest rubs, and inhalants. The same goes for oil of eucalyptus (Eucalyptus globulus). Each herb contains compounds that relax the airways and open congested sinuses and nasal passages.

http://www.motherearthliving.com/health-and-wellness/cold-busters.aspx?PageId=4

Hoping this article be helpful.

"Vitamin C for preventing and treating the common cold."

Best luck.

http://www.ncbi.nlm.nih.gov/pubmed/23440782

THANK YOU ALL.

@ Bhavna Singh

Please see these useful RG links.

Article A randomized controlled trial of vitamin C in the prevention...

Article Vitamin C for preventing and treating the common cold (2013)

Article Vitamin C for Preventing and Treating the Common Cold

Article Vitamin C for preventing and treating the common cold

Article Vitamin C, the placebo effect, and the common cold: A case s...

Article Vitamin C for Preventing and Treating the Common Cold

Article Megadose vitamin C in treatment of the common cold: a random...

Article Effect of vitamin C on common cold: Randomized controlled trial

Thanks!

regular vitamin C supplements had several benefits, including:

• Reduced cold severity: They reduced the symptoms of a cold, making it less severe.
• Reduced cold duration: Supplements decreased recovery time by 8% in adults and 14% in children, on average.

A supplemental dose of 1–2 grams was enough to shorten the duration of a cold by 18% in children, on average

Other studies in adults have found 6–8 grams per day to be effective

Vitamin C appears to have even stronger effects in people who are under intense physical stress. In marathon runners and skiers, vitamin C alantost halved the duration of the common cold