Bright lights, big city ... big zit? Several studies, including one published in the "Journal of Investigative Dermatology" and another in the "International Journal of Cosmetic Science," have long suggested that smog could be stressing out -- even damaging -- human skin cells, depleting them of valuable substances like Vitamin E. So what's a city girl to do? Adopt these 10 lifestyle habits and send those pesky skin irritants packing.

Even on a cloudy day in a windy city, the sun's UVA and UVB rays can find their way to you, bringing sunspots and premature wrinkles. Exercise damage control by limiting sun exposure whenever possible and protecting your skin with products like CHANEL UV Essentiel, $48, which contains UVA and UVB blocker Zinc.

In an already polluted environment, the last thing your skin needs is a cloud of smoke front and center. Yes, it looks glamorous in movies; yes, it abstains your appetite; and yes, it's addictive. But cigarette smoke not only speeds up signs of aging, it also clogs pores and may worsen acne. Is it really worth fitting into your skinny jeans if your face suffers?

Celebrity derms and makeup artists -- most of whom have seen what late nights of socializing and long days at work can do to skin -- insist that moisture be a top priority. "Use the best product for your skin, not necessarily the most expensive," says celebrity makeup artist Patty Bunch. Since smog depletes your skin of moisture-rich antioxidants, consider popping open a skincare capsule of Vitamin E or C to supplement the loss. (Tip: You can even use it as a primer under makeup.)

"By having a diet that is very rich in greens [and/or] supplemented with green pounder drinks you can get in health food stores ... you raise your body's PH balance, which leads to anti-aging," says dermatologist Dr. Jeanette Graf. On the other hand, acid producers like caffeine, alcohol, dairy and cigarette smoke need to be limited as they have the opposite effect.