Even before looking internally, there’s one beaming factor that can physically stress out your skin and weaken its defenses: ultraviolet (UV) radiation. A carcinogen via sun exposure, it can have a negative effect on skin.
Whether in the form of natural sunlight or more artificial means such as tanning beds, absorbing ultraviolet rays can signal blood cells to rush to the exposed area in an attempt to repair it. This manifests into sunburns, but it doesn’t end there: Overexposure to ultraviolet radiation may lead to darkened blemishes, moles, and even skin cancer.
The best way to combat UV rays and sun stress is by applying sunscreen every morning. Brands like Avène and Dermalogica have cute and compact oil-free versions, making the mundanity of a daily routine less so. They’re not only easy to carry around, but also easy to use, so you’re less likely to forget to apply daily.
While they can’t replace sunscreen, it can be a great boost for people who have a hard time finding sunscreen that doesn’t leave a white cast.
You may recognize limonene, a chemical derived from the skin of citrus fruits and studied for use in cancer prevention medicines. Well, eating those fruits — in particular citrus peel — might also provide sun protection too.
Fruits high in antioxidants and vitamin C (like strawberries and pomegranates) possess the ability to protect your cells from the free radical damage caused by sun exposure.
Source : https://www.healthline.com/health/beauty-skin-care/stress-skin