As you mature, your skin loses collagen and moisture, and the elasticity of the skin's fiber network begins to degenerate...This leaves your skin feeling tighter, drier, and generally much less supple. This is known as intrinsic aging, and it's an unavoidable natural body process.
Externally, daily exposure to harsh environmental elements dramatically accelerates the skin's aging process and is known as extrinsic aging. The more often your skin. comes into direct contact with harmful ultraviolet light, the more likely you will develop unwanted signs of photodamage (wrinkles, hyperpigmentation, and possibly even lesions that can lead to skin cancer). In addition, this UV exposure causes the skin to lose collagen and elastin even more quickly than intrinsic aging does alone.