The most common cause of thinning lips is the breakdown of collagen in the lips due to age. The upper lip commonly experiences the most change, lengthening over time. Other factors that contribute to Thin Lips are:
Juvéderm Dermal Fillers / Collagen Injections
I wanted just a bit more fullness in my lips. I didn't want to look like a duck the way so many other people do who go elsewhere. My results are completely natural looking and I am very pleased.