Many cosmetics contain water, which unfortunately provides excellent growth conditions for various kinds of bacteria and fungus. To prevent such contamination, the products are always manufactured under sterile conditions.

However, these sterile conditions last only until you have opened the packaging. To ensure that opening them does not allow free passage to contaminants, most products therefore also contain one or more preservatives.

Preservatives help to ensure that the product remains fresh until the use-by date on the packaging – like the 'jar' symbol on cosmetic products, which indicates how long the product will remain fresh under normal use after opening.

Preservatives are regulated by the EU cosmetics directive. Nevertheless, it is impossible to rule out the possibility that a substance may provoke an allergic reaction for some people.

Some preservatives are criticised for having allergenic or hormone-disrupting effects. Matas carefully monitors the current international research in preservatives in order to be sure it exclusively utilises effective preservatives that are at the same time as mild as possible.

Matas has therefore ceased to use the following preservatives in all its own 'striped' products:

  • Methyldibromo glutaronitrile

  • Triclosan

  • Kathon

  • Butylparaben

  • Isobutylparaben

  • Propylparaben

  • Isopropylparaben

These substances have been replaced by mild alternatives.