LIPO-AMINO ACID ALKYL ESTERS AS SPF BOOSTERS

The use of lipo-amino acid alkyl esters as SPF (Sun Protection Factor) boosters in cosmetic compositions comprising a sun filter is described. Said alkyl esters, when added to cosmetic compositions containing a sun filter, increase their SPF value to an extent of even 50% or higher: it is thereby possible to significantly reduce the amount of sun filter used, while maintaining a high SPF. The SPF booster effect was observed in different types of cosmetic compositions and with different sun filters, thereby supporting the wide use of the present alkyl esters in cosmetic compositions for the use described herein. Said alkyl esters have a strong natural connotation, respectful of the environment and of the organic tissues, and can in turn be obtained by eco-friendly synthesis methods which do not involve the use of aggressive reagents which could remain in traces in the final cosmetic product: photoprotective cosmetic compositions are thereby obtained which have high safety of use and are likely to be better accepted by the consumer.