Unverified90% confidenceTradeoffTime unknown
SPF值越高防护越强但肤感越厚重、致敏概率越高；SPF30已能阻挡约97%的UVB，SPF50约98%，从30到50提升有限，日常没必要盲目追高
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90%
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Long-term
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UnverifiedSPF值越高防护越强但氧化锌浓度越高、越厚重泛白搓泥；日常无需盲目追求SPF50+，SPF30已阻挡约97%的UVB90% similarUnverifiedSPF值超过50对UVB防护提升边际效应极小（SPF50阻挡约98%，SPF100约99%），不必为高数值支付溢价，反而高浓度化学防晒剂刺激性更强88% similarUnverifiedSPF数值与防护率非线性: SPF15阻挡约93%UVB，SPF30约97%，SPF50约98%，从30升到50提升仅约1%，日常通勤SPF30已足够，追求更高数值意义有限反而增加油腻感88% similarUnverifiedSPF值越高通常需要越高浓度防晒剂，质地越厚重油腻、颜色可能偏白，追求轻薄透明口感与追求SPF50高倍防护难以兼得87% similarUnverifiedSPF越高、防水性越强，成分越复杂且卸除越难，日常低强度场景用高倍防晒反而增加皮肤负担，非必要不追求SPF50+86% similar
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