One recent study, reported in the Archives of Dermatology, showed that up to 40 percent of the factors that cause skin aging are likely to be environmental in origin. In other words, much of the aging process comes from outside influences and things that may be within our control.

While sun exposure is the single biggest environmental factor that affects skin aging, this study in particular noted that smoking and weight can also play a role. While we’re still learning a great deal about how external factors play a role in the aging process, here are some issues that contribute to skin aging: *Smoking and second-hand smoke. It has long been understood that cigarette smoking causes wrinkles.

Now, however, researchers also are finding that second-hand smoke can play a role, too, by clogging the skin and depriving cells of oxygen.

• Diet. As I noted on my Diet page, what you eat and when you eat is critically important. Not just for your overall health, but also for your skin’s appearance. Our diet is something over which we have control and the importance of good eating as it relates to your skin’s appearance cannot be over-stated.


• Climate and air temperature. Air temperature and humidity levels can have an effect on your skin. Hot air can dry the skin by sucking moisture from your body. dry air can cause a breakdown of collagen. In winter, cold air can dry the skin, as can indoor heat. During harsh weather of any kind, it’s important to drink lots of water. And on cold days especially, your skin care routine should emphasize the barrier function, fortifying the skin lipid barrier. In summer, when the heat and humidity is high, you can lighten up on night creams and other heavier products.


• Air quality and pollutants. While we can’t necessarily exert control over the air we breathe, its quality does play a role in our skin’s appearance and overall health. Air pollutants and tiny particulates can be damaging, as can exposure to industrial and household chemicals. In addition, allergens in the air can cause skin reactions.


• Stress. In this day and age, it’s hard to find someone who doesn’t feel a great deal of stress in her life. Stress also can lead to lack of sleep, which affects the appearance of the skin. Relaxation and sleep can greatly improve your skin, which is why I suggest finding ways to manage stress, whether it be through simple exercise like walking or yoga or taking just a few minutes for deep breathing. I also believe that proper rest – a good night’s sleep – should be a priority.


• Medications. Reactions to certain types of medications can cause skin changes. If you notice changes, check with your doctor to see if they correlate with any medications you are taking. Finally, although I have said it many times, but let me once again emphasize that sun exposure is the single biggest environmental factor you can control. Always wear an SPF 30 sunscreen and protect yourself from the sun as much as possible.