Fluorescence is the re-emission of light by a substance having previously absorbed it. The most striking examples of fluorescence occur when the absorbed radiation is in the ultraviolet region of the spectrum, and thus invisible to the human eye, and the emitted light is in the visible region
Phytoene and phytofluene are such substances – when illuminated by sun and UV light they fluoresce, emitting green light.
As applied in cosmetics, fluorescence can influence the colour appearance of the skin, as the greenish fluorescent emission from sun – or UV-illuminated phytoene and phytofluene perform the function of colour opponency.
IBR-Phyto(flu)ene: phytoene and phytofluene, the colourless carotenoids, are colourless in the visible range, and absorb light in the UV range only. These molecules have effective and beneficial activities, enhancing skin anti-inflammatory capacity, protecting against UV and oxidative damage that can lead to premature ageing along with protection of DNA from UV and free radical damage and collagen from degradation. These activities, long substantiated with in vitro and in vivo studies, have also now been demonstrated to be effective in low concentration in recent clinical studies.
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