Exposure to Ultraviolet Light
Over time, UV light breaks down skin cells.
Smoking, Drinking, Drugs
No surprise here. Crystal meth can make a 25-year-old look like a 50-year-old in just two years of addiction!
Exposure to Salt Water
This one comes as a shock to most people due to decades of creative marketing. Salt attacks human skin both physically (in skin crevices) and chemically (corrosion). In swimming pools, salt water is even worse because the pool water also contains chlorine which is extremely harmful to human skin.