Getting a tan means your skin cells are being damaged by sunlight, and that damage adds up over time to cause wrinkles and skin cancer.
Scientific Claim
Ultraviolet radiation exposure induces melanin production as a protective response, but this process simultaneously causes cumulative DNA damage in skin cells, leading to photoaging and increased risk of skin cancer.
Original Statement
“So even like low level sun exposure... Tan is already your skin cell saying “this is too much.” So you're trying to protect yourself. So yeah, no, there's no level... I'm trying to think if there's a way I can nuance this to make it, make you feel better about it. But there is no low level sun exposure where you're going to be able to get a tan and kind of keep that going over time while not incurring the damage, which is going to make you look like a wrinkled prune when you're older, but also the risk of skin cancer, so don't forget that.”
Context Details
Domain
oncology
Population
human
Subject
Ultraviolet radiation
Action
induces
Target
cumulative DNA damage and photoaging
Intervention Details
Evidence from Studies
Supporting (1)
UV-exposure, endogenous DNA damage, and DNA replication errors shape the spectra of genome changes in human skin
This study found that sunlight (UV rays) causes permanent damage to skin cell DNA, even in areas not directly exposed, and this damage builds up over time—leading to aging and cancer. This matches the claim that UV exposure triggers melanin (a protective tan) but still harms DNA.
Contradicting (1)
ATM signaling delays skin pigmentation upon UV exposure by mediating MITF function towards DNA repair mode.
When your skin gets sunburned, this study found that your body doesn’t immediately make more melanin (tan) — it actually stops tanning for a bit to focus on fixing DNA damage first. So the claim that tanning is a direct protective response is wrong.