Before we get into the correlation between thin lips and ageing, let’s first break down our understanding of collagen. What is it, and how does it affect us? Essentially, collagen is a protein that is the building block of bones, skin, muscles and tissues. Our body is constantly producing collagen, but as we grow older, the amount of collagen produced by our body keeps decreasing. So in our youth, our body is at its peak of collagen production. When we start to hit our 30s, our collagen levels begin to dwindle. Every year after the age of 30, it is said that our collagen production falls by 2%. So you can only imagine the depletion in collagen when we hit our 50s and 60s.