Intimate cleansers must be formulations as delicate as possible, since they come into direct contact with the mucous membranes, characterized by a very thin cellular layer.
They must not alter the natural microbial flora even in the case of frequent washing and it is preferable to be free of alcohol and strong fragrances, in order to reduce the presence of potentially allergenic substances.
Cleansing must take place at acid pH, perform a mild bacteriostatic action and inhibit the formation of odors. Plentiful foaming is not required, rather easy to rinse without leaving residues.
Intimate cleansers must not modify the natural acidity of the mucous membranes and must be formulated with non-aggressive and irritating surfactants.
To the alkyl sulphates and alkyl heterosulfates, other more delicate anionics are preferable, such as sulphosuccinates, acylglutamates or codensated protein-fatty acids, derived for example from the condensation of coconut fatty acids and amino acids of wheat or oats (Sodium Cocoyl Wheat Amino Acids, Sodium Cocoyl Oat Amino Acids), very delicate products and well tolerated by skin and mucous membranes.
If alkyl sulfates are used, the less irritating ones such as magnesium salts are preferable. Anionics should be associated with amphoteric surfactants, such as betaine, or non-ionic surfactants.
Opacifying substances can be added, such as long chain alcohols or glyceryl monostearate, which increase skin tolerability, over-greasing oils and functional substances, such as specific-action plant extracts.
Among these we can remember the extract of chamomile, calendula and linden, with a refreshing and soothing activity, extract of thyme and tea tree oil, with antiseptic action and that of lavender with deodorising properties.
