Sun protection preparations (sunscreens) are classified differently internationally. The Sun Protection Factor (SPF) determination methods as well as the UV filter substances are not harmonised so far.
According to all available scientific studies, the UV filters sold in the EU are effective and safe. Further research is necessary to implement sun protection filters in the nano sector. According to the current legislation in Europe one cannot expect the development of new and better biodegradable UV filter substances because necessary animal testing is prohibited and alternative methods are not predictable.
Solar radiation is essential to all life on earth. Concerning humans, it has major advantages and disadvantages. Sunlight increases the joy of life – most people can agree on that. Scientifically this can be proved by showing that bright light has an antidepressant effect.1 Moreover, solar radiation exposure is essential for the generation of vitamin D in humans, which has a positive effect on health.2,3 More subjective and possible objective effects of sunlight on humans could be added. Major disadvantages of solar radiation exposure are the ageing effect and of course the carcinogenic potential. Solar radiation is composed of electromagnetic radiation in a frequency spectrum that partly reaches the earth’s surface: infrared radiation (IR), visible light (VL), ultraviolet A (UVA) and ultraviolet B (UVB) radiation. Figure 1 gives an overview of this. Sun protective cosmetics (sunscreens) are designed to reduce the negative features of solar radiation on human skin to a minimum. Chemical and physical filters are used in sunscreens to increase SPF.
Solar radiation and its effect on human skin
Log in or register FREE to read the rest
This story is Premium Content and is only available to registered users. Please log in at the top of the page to view the full text.
If you don't already have an account, please register with us completely free of charge.
