Using a sample of 322 healthy adults in New Zealand, a team of researchers led by David R. Murdoch, MD, Department of Pathology, University of Otago, Christchurch, New Zealand, found that getting high doses of supplements of vitamin D are ineffective to protect against colds, flu, or sinus infections. The study titled “Effect of Vitamin D Supplementation on Upper Respiratory Tract Infections in Healthy Adults The VIDARIS Randomized Controlled Trial” is being published (free) in the Journal of the American Medical Association (JAMA) this week.
The 322 people in the sample test were divided into two groups of 161 persons each. One group was given large doses of vitamin D on a monthly basis for duration 18-month period, and another group just took a placebo. The research findings showed that both groups developed many respiratory infections during the clinical trial.
The natural vitamin D is usually found in dairy products, such as milk, cheese, and others. If human skin is exposed to sunlight, it will automatically produce the natural vitamin D.
In order to prevent against colds, flu, or sinus infections, medical experts suggest that we should eat a balanced diet with ingredients include vitamins and minerals. Regular exercising will also help to maintain a healthy life.