The scalp is exposed daily to multiple factors (mechanical, thermal, chemical and environmental) causing redness and irritations. These aggressions are not without consequence for the hair: it becomes dull and loses volume resulting in hair that is thin, dry and brittle.   Cognizant of these hair-damaging culprits, hair routines are evolving to consider the state of the scalp and quality of the hair. At a time when hair care is becoming more sophisticated by adopting skin care strategies...