Indoor tanning use is associated with psoriasis in the Nurses’ Health Study II

Psoriasis is a chronic immune-mediated disease of the skin that affects approximately 2% of the US and Europe population1 . The disease presents a significant burden for affected individuals and negatively affects their quality of life. Environmental and life-style factors play important roles in this disease, and several complex disorders have also been linked to psoriasis1,2 . Phototherapy, performed under medical supervision, is an effective treatment for psoriasis1 . Indoor tanning produces artificial ultraviolet radiation and has been shown to increase the risk of skin cancer and accelerate skin aging.

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