UVB rays cause sunburns, but UVA rays penetrate deep into the dermis, destroying collagen fibers and generating free radicals. This process, known as photoaging, leads to deep wrinkles and sagging skin.
Apply a broad-spectrum SPF 30 or higher sunscreen every day, regardless of weather. Modern mineral sunscreens containing zinc oxide soothe the skin while forming a physical shield against UV rays.
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Board-Certified Dermatologist & Biomedical Researcher
Dr. Vivienne Chen is a board-certified dermatologist and biomedical researcher with over 12 years of clinical experience in cellular aging, peptide therapies, and skin barrier health.
Yes. UVA rays easily penetrate standard window glass, causing cumulative skin damage over years.
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