Does sunscreen expire How much SPF is enough Your burning questions, answered

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Sunscreen is essential for protecting skin from sunburn, premature aging, and cancers like melanoma.
Experts emphasize using SPF 30 or higher, applied generously and reapplied every two hours, especially after swimming or sweating.
Sun protection should also include hats, protective clothing, and avoiding peak sun hours.
UV rays not only cause burns but also wrinkles, sagging, dryness, and hyperpigmentation.
A “base tan” is a myth—tanning is a sign of skin damage, not protection.
Mineral sunscreens (zinc oxide, titanium dioxide) reflect rays, while chemical sunscreens absorb them; both are safe and effective.
Concerns about oxybenzone exist, but dermatologists still recommend sunscreen use over skipping it entirely.
People with darker skin also need sunscreen since melanin only provides minimal natural SPF.
Vitamin D needs can be met safely with diet or supplements, not unprotected sun exposure.
Sunscreen does expire, though slightly expired bottles may still work—if you’re using enough, bottles shouldn’t last long anyway.