The Longevity LetterSkin & Hair

Why I cover my face in winter (not about germs)

Hillary Lin, MD·
Dr. Hillary Lin video: Why I cover my face in winter (not about germs), longevity medicine physician

Cold dry air is an irritant to your airways. A scarf or mask over your nose and mouth: ✓ Warms the air before it hits your lungs ✓ Recycles your exhaled humidit…

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