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The "Willner Window" Radio Show. Your source of nutritional supplement information and interviews, weekly, for 18 years. Listen to archived mp3 audio files.

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Vitamin D Reduces Upper Respiratory Tract Infections

Intense physical training in winter increases chances for upper respiratory tract infections (URTI). In this study, doctors gave 25 male taekwondo athletes a placebo or 5,000 IU of vitamin D per day during the four-week winter training session.

Vitamin D levels rose 255 percent in the vitamin D group and remained unchanged for placebo. Also compared to placebo, among those who came down with upper respiratory tract infections, the vitamin D group reported 40 percent less severe symptoms including sneezing, runny nose, and coughing. Athletes also answered questionnaires about quality of life, which scored 27.8 percent higher for the vitamin D group compared to placebo.
(Reference: International Journal of Environmental Research and Public Health; 2018, Vol. 15, No. 9)

Product Recommendations by Arnie Gitomer

Vitamin D 5,000 IU is available from many suppliers.

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