Which approach is best for preventing photoaging and keeping the skin looking young?

• A. Begin collagen injections at the first signs of wrinkles.
• B. Use sunscreen with SPF 15 or wear a hat.
• C. Use alpha-hydroxy acid.
• D. Use prescription topical tretinoin.

Answer: (B)

Sun exposure is the main driver of photoaging, so the most effective way to keep skin looking young is to minimize UV damage. Using sunscreen with adequate SPF protects skin from UVB and UVA rays, reducing DNA damage, collagen breakdown, and pigment changes that drive aging. Wearing a hat adds a physical barrier, further reducing sun exposure to the face and neck. Together, these preventive measures directly limit the key lifestyle factor that accelerates aging.

Other options address aging after it has appeared or focus on cosmetic treatment rather than prevention. Collagen injections target existing wrinkles rather than preventing new damage. Alpha-hydroxy acids exfoliate and can improve texture, but they don’t stop UV-induced structural aging. Prescription tretinoin can improve signs of aging but is a treatment for damage already done and can increase sun sensitivity, making sunscreen even more essential.