Chapped lips are caused by a lack of moisture when the layer of oil naturally produced by the body to coat the lips dries up. Exposure to cold and dry air, intense exposure to the sun, and indoor heating are all major culprits to dry and swollen lips.
The lips are more vulnerable to drying out because the skin there is thin (it contains up to five cellular layers, whereas facial skin contains up to 16 layers). Also, because the skin on the lips does not contain sebaceous glands, sweat glands, or hair follicles, it does not have the usual protection of hair, sweat, and body oil to keep the skin protected.
If your lips are dry, your skin probably is too. In fact, your body is likely thirsting for water. The best bet for preventing chapped lips is to keep your body hydrated by drinking lots of water. Remember that your requirement for water is much greater when you are active and consuming the typical backpacker’s diet that includes mostly dried foods – especially if you are frequently munching on dried fruit, trail mix, and energy bars throughout the day. So, water is the first defense. The next defense is lubrication from plant oils. The oils can come from food (nuts & seeds), or lip balm applied topically. A balance of oil and water works together to keep the skin cells hydrated. The oil acts as a shield, preventing the evaporation of the moisture (water) present in the outer layer of the skin cells.
What can you do when you are backpacking and have no access to such luxuries as shea butter, jojoba oil, beeswax, or camphor?
Make sure you review the ingredient label. Don’t forget that your skin has absorbent qualities, and the ointment will likely make its way inside your mouth and be swallowed. For this reason, we do not recommend using petroleum-based products on your lips. If you can’t eat it, why smear your lips with it? Petroleum has lubricating qualities but not moisturizing qualities. The oily residue from Vaseline or Chapstick may feel like it is providing a protective film on your lips, but it dries out your lips further; it also requires you to apply it more often and buy more of it. Instead of petroleum based-lip balm, look for one that contains natural moisturizers such as camphor or beeswax. Also, ensure it contains sunscreen; zinc oxide is excellent because it protects against UVA and UVB rays.
Finally, giving your body the proper nutrients is essential to keeping it functioning at optimal potential. Stay healthy by avoiding foods that impair your health. The SAD (Standard American Diet) diet is a disaster. It is the leading cause of so many ailments and diseases. Fortunately, we can prevent and heal many of these diseases by eating organic, whole foods. The best defense against dry, chapped skin and lips is to consume a variety of vegetables, fruits, grains, nuts, and seeds, in addition to drinking plenty of water to keep the skin hydrated. Also, focus on eating foods high in essential fatty acids. Alpha-Linoleic acid (ALA) is an essential fatty acid needed to keep the skin lubricated. Good plant-based sources of ALA include walnuts, sunflower seed, hemp seed, chia seed, flax seed, and soy.
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The tip about using your own natural oil to help protect the lips is just amazing, I will have to try it out sometime, although the warm air trick isn't going to work as the moisture will just evaporate. http://drylips.org/