| http://www.w3.org/ns/prov#value | - This results in an unpleasant odour, which increases substantially during use, which can be offensive to users.The present inventors have surprisingly found that incorporating zinc compounds, particularly zinc oxide, in such hair treatment compositions substantially reduces malodour production, both on storage and in use.SUMMARY OF THE INVENTIONAccordingly, the present invention provides a hair tr
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