Answer to Question #39285 in Other Biology for Anesa
• Some sunscreens only protect against UVB radiation, and not against UVA component of the spectrum. Although UVB is the chief cause of skin reddening and sunburn, UVA rays account for up to 95 percent of the UV radiation reaching the Earth's surface. That’s why, the broad spectrum (UVA/UVB) sunscreen protects skin better.
• Reduced exposure to UVB radiation supresses production of the natural photoprotector, melanin.
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