Why is zinc oxide the best UV filter?
为什么氧化锌是最好的紫外线过滤剂？
P4O use zinc oxide as their only active ingredient, and here is why:  + It is the only reef-safe UV filter available.  + Zinc oxide provides excellent sun protection and has several advantages over synthetic actives. Zinc particles sit on top of your skin and act as a reflective barrier (exactly like a mirror) to block both UVAs & UVBs from penetrating your skin and causing damage and ageing. + It is the only FDA* and TGA** approved broad spectrum sun protection ingredient, and unlike any other active ingredient, its concentration in a product has no limitation. It is also the EWG (Environmental Working Group) nº1 ingredient for skin protection. + Zinc oxide is also effective for healing the skin. It can be used to heal wounds, reduce the tenderness associated with sunburns and soften chapped skin. It is sometimes used as an acne treatment - it is believed to reduce the appearance of blemishes and reduce skin irritation and inflammation, reducing the number and severity of acne breakouts. * Food & Drug Administration (US).
** Therapeutic Goods Administration (AU).
P4O用途氧化锌作为它们唯一的活性成分，原因如下： + 它是唯一一款对珊瑚礁安全的紫外线过滤器。 + 氧化锌提供出色的防晒保护，并且比合成活性物质具有多种优势。锌颗粒位于您的皮肤表面，充当反射屏障（就像镜子一样），阻止 UVA 和 UVB 穿透您的皮肤并造成损伤和老化。 + 这是唯一的美国食品药品监督管理局* 和热重分析** 经批准的广谱防晒成分，与任何其他活性成分不同，其在产品中的浓度没有限制。这也是专家工作小组（环境工作组）皮肤保护的第一成分。 + 氧化锌也能有效治愈皮肤。它可用于治愈伤口，减少晒伤引起的压痛并软化干裂的皮肤。它有时被用作痤疮治疗——它被认为可以减少瑕疵的出现，减少皮肤刺激和炎症，减少痤疮爆发的数量和严重程度。 * 美国食品和药物管理局。
** 治疗用品管理局 (AU)。