How does nicotine affect skin health?

Nicotine has significant effects on skin health, one of which is that it constrains blood vessels. This vasoconstriction reduces the amount of blood flow reaching the skin, leading to several adverse effects. The constriction of blood vessels can result in decreased oxygen and nutrient delivery to the skin cells. This reduced circulation can contribute to a dull complexion, slow down the healing process, and lead to an increased risk of skin damage.

Consequently, the compromised blood flow can also impact the skin's ability to maintain proper hydration levels, as skin health is closely tied to how well it is nourished by these resources. The limitation of blood flow can accelerate the aging process of the skin by preventing essential elements from reaching the surface, ultimately resulting in diminished elasticity and a less youthful appearance.

Given these factors, it is clear how nicotine's constraining effect on blood vessels significantly detracts from overall skin health, making this the correct choice.