What leads to a sallow complexion associated with smoking?

A sallow complexion resulting from smoking is primarily due to the reduced blood flow and nutrients delivered to the skin. Smoking constricts blood vessels, which diminishes the circulation of oxygen and essential nutrients required for healthy skin. This decreased blood flow can lead to a lack of vitality in the skin, contributing to a dull and yellowish appearance, often described as sallow.

In contrast, increased hydration, enhanced circulation, and improved elasticity of the skin are all benefits associated with healthy lifestyle choices and do not align with the effects of smoking. Smoking's negative impact is a crucial factor in understanding the relationship between lifestyle choices and skin health, particularly in recognizing how toxins in cigarettes can result in a less vibrant complexion.