Inorganic filters such as titanium dioxide and zinc oxide form a physical barrier and protect against UV radiation and also to some extent against pollution, infrared and blue light. Blue light is high energy visible light (HEV), emitted primarily by the sun, but also by electronic devices. It can have a negative effect on vision, circadian rhythm, and skin by interacting with photoreceptors, which while predominantly present in our retinas, are also present in the skin.23-27 Blue light can induce oxidation and inflammation, and thus accelerate skin ageing. In vitroand in vivotesting has shown that Capsicum annumred pepper extract is rich in capsanthin compounds. These are classes of carotenoids which have the ability to absorb blue light and thereby reduce its harmful effects. This extract works as an even stronger antioxidant than the well-known beta-carotene, helping to prevent changes in DNA and reducing cellular responses to blue light such as pigmentation. The extract also protects collagen from infrared light, which has the ability to deeply penetrate the skin and stimulate the formation of free oxygen radicals.28, 5 New grades of titanium dioxide have also appeared on the market, which show a greater ability to protect against infrared radiation than conventional UV filters or pigments currently used in colour cosmetics. These grades of titanium dioxide have been shown to limit the rise of skin temperature when exposed to IR irradiation, indicating that IR light is being blocked.29 


source from https://www.personalcaremagazine.com