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In our last article, we introduced the “three brothers” of ultraviolet radiation—UVA, UVB, and UVC. But when you pick up a sunscreen, you usually only see two indicators on the label: SPF and PA. What do they really mean? And have you actually chosen the right sunscreen? Don’t let those numbers and plus signs confuse you anymore—today, we’re breaking it all down for you in a clear and simple way.

We often hear that we need protection from ultraviolet (UV) rays and that photoaging is a major cause of skin aging. But what exactly is UV radiation? Imagine that within sunlight there is an invisible “special squad” – these are the ultraviolet rays. This squad has three very different brothers: UVA, UVB, and UVC. Getting to know them is the first lesson in protecting your skin.

UV absorbers are important chemical components that protect products and materials from the harmful effects of UV radiation. These absorbers are used in a wide variety of products, including plastics, coatings, textiles, and personal care products, to name a few. There are many different types of UV absorbers on the market, but which one is the best?