Hurdle Technology is used to describe the intelligent combination of different preservation factors or hurdles to deteriorate the growth of microorganisms.
The technology has been used for the control of product safety in the food industry since 1970s, and is now being applied to the production of self-preserving cosmetics. Adherence to current good manufacturing practice, appropriate packaging, careful choice of the form of the emulsion, low water activity and low or high pH values are significant variables for the control of microbial growth in cosmetic formulations.
A paper to this effect has recently been published by a Greek group. This paper describes the application of the basic principles of Hurdle Technology in the production of self-preserving cosmetics. Multi-functional antimicrobial
ingredients and plant-derived essential oils and extracts that are used as alternative or natural preservatives are also described.Varvaresou A, Papageorgiou S, Tsirivas E, Protopapa E, Kintziou H, Kefala V, Demetzos C. 2009. Self-preserving cosmetics. Int J Cosmet Sci. 2009 Jun;31(3):163-75.
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