Most of aging is influenced by genetics, ethnicity, sun exposure, and what you do (or don’t do) to care for your skin. The most noticeable changes are decreased skin elasticity, darker pigmentation, pronounced fine lines and overall thinning of the muscle and fat of the face.
Natural skin cell turnover slows as you age. The process takes two weeks for babies takes three to four weeks for teens. Once past your teens, your skin generally renews itself once a month (about every 30 to 40 days) and gets even more slow after 50 years old, renewing itself only 45 to 90 days.