Sunlight helps your body process vitamin D, and a deficiency of this vitamin is linked to common colds. If you live somewhere that doesn't get much sunlight during the fall and winter months, it may be a good idea to look into vitamin D supplement options.
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Zinc
Some studies suggest that zinc can shorten the duration of your cold. You can find lozenges, supplements, or even nasal sprays — and start taking them as soon as you feel a cold coming on!
