MARLO THOMAS
02/23/2015 10:35 am ET Updated Dec 06, 2017

The Three Most Damaging Things For The Skin, From Dr. Jeanine B. Downie (VIDEO)

What are the three most harmful things for the skin? According to board-certified dermatologist Dr. Jeanine B. Downie, the three things that most negatively impact the skin are sun exposure, cigarette smoke (or smoke of any kind) and stress. Applying an SPF of at least 30 every day, regardless of the weather, will help protect your skin from the sun's harmful rays. If you're a smoker, quitting that habit will improve your skin dramatically. As for stress, Dr. Downie recommends managing your stress levels with exercise. Stress actually causes skin conditions like psoriasis, acne and eczema to flair up -- stress can even cause hair loss!

For more of Dr. Jeanine B. Downie's advice, view the slideshow below:

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Dr. Jeanine Downie's Skin Care Tips

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