For many years, sodium lauryl sulfate (SLS) and sodium laureth sulfate (SLES) have been the mainstay surfactant base in personal care cleansing formulations. Increasingly, however, there is a move to replace these and other sulfate-containing surfactants with sul-fate-free alternatives. This trend appears to have started 8-10 years ago in North America when consumers sought sulfate-free formulations, perceiving the benefits to include mild, gentle, non- stripping more naturally-derived products. The number of sulfate-free cleansing products (hair and body) launched has grown significantly since 2007.
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