With the ever-growing popularity of sunscreens, it is important for the formulator to use the most effective and efficient strategies to maximise the protection potential of each UV filter within a formulation. Studies have shown that exploiting the synergistic effects of a combination of organic and inorganic UV filters can greatly benefit the overall formulation by allowing for higher solids loading, less interaction with organic UV filters and lower costs per unit of SPF. The synergy benefits of using both types of UV filters are well documented and are based upon the different mechanisms of protection from each type of UV filter working differently to each other but also working well together. This has previously been demonstrated in a study using the Monte Carlo calculation, which used typical optical parameters of the skin to characterise the synergy effect when organic and inorganic UV filters are used together. This proved that the synergistic performance is caused by light
Benefits of organic & inorganic UV filters
Croda has found that a combination of organic and inorganic can work best when it comes to protecting the skin from the effects of the Sun
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