Bend Beauty: The New Science of Skincare

Collagen production starts declining in your 20’s. By age 80 collagen
production is reduced by 70%. In addition, collagen is constantly under
attack by free radicals which damage and weaken the collagen matrix.
The decline in collagen production along with the increase in collagen
damage results in significant changes in the skin: fine lines, furrows,
roughness, and wrinkles.