You know about UVA and UVB rays, but the lesser-known UVC rays are the shortest wavelengths emitted from the sun. They have the potential to be the most harmful, capable of damaging collagen and DNA. However, the ozone layer absorbs UVC rays and, in theory, prevents them from reaching Earth’s surface.
Although the atmosphere has built-in UVC protection, the ozone layer is thinning. Therefore, several sunscreen manufacturers are starting to incorporate ingredients believed to block these rays, providing an extra level of defense.
So, should you be worried? Probably not. At least not yet.
Keep in mind, more than 97% of the sun’s UVC rays are successfully absorbed by the ozone layer, so they are not currently a serious threat. Experts say that a broad-spectrum sunscreen-one that protects against UVA and UVB rays-is all you need for optimum protection.