There is no scientific answer to this as it’s very subjective and really depends on the needs of your hair and scalp, on the environment you live in, your lifestyle etc. In the user trials for our haircare ranges we asked our panellists to use our haircare routines on an average of 3 times per week. However, if you have very oil-prone hair you may wish to wash your hair more frequently than this, or if you have dry or very dry hair you may wish to wash your hair less frequently – it really depends on your hair, scalp and lifestyle needs!