Which of the following factors is NOT a common contributor to extrinsic aging?

Genetics is the factor that is not commonly associated with extrinsic aging. Extrinsic aging refers to the aging process influenced by external factors such as environmental stressors, lifestyle choices, and exposure to harmful agents. These external factors include smoking, UV radiation, and pollution, all of which can accelerate skin aging by causing damage to the skin structure and function.

In contrast, genetics pertains to the intrinsic aging process, which is determined by an individual's genetic makeup. This includes inherited traits such as skin type, elasticity, and the natural aging process that occurs with time, independent of lifestyle or environmental influences. Understanding this distinction is crucial for estheticians and skin care professionals as it emphasizes the importance of addressing external factors to mitigate signs of aging effectively.