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right.
and yea, vasoconstriction is vasoconstriction and we know nicotine (among other stimulants) causes it, and therefore, it's going to reduce blood flow to the skin. reduced blood flow = less oxygen/nutrients. over time, this can slow down the healing/regeneration process of the skin, which would lead to a more aged appearance. this also effects hair follicles.
there's not much else to prove here; it's cause and effect.