Darkened, chapped lips can lead to a bad first impression by making you look unclean and unhealthy. The causes of lip darkening ranges from the body's absorption of toxic ingredients to the lack of proper lip care.
If you have naturally dark lips, then this post is not for you **wink**.
As easy as it is to blame lip products for the 'gradual' darkening of your lips, you should know that lots of other things such as; smoking, consumption of tea & coffee, exposure to sunlight and dehydration can also contribute to the darkening of your lips. I've listed a couple of things that can cause your natural lip colour to change below;