About 90% of Americans shampoo daily. One hundred years ago, people only washed their hair monthly, and in the 1950s, it was customary for women to have their hair washed and set once a week at the salon.
About 90% of Americans shampoo daily. One hundred years ago, people only washed their hair monthly, and in the 1950s, it was customary for women to have their hair washed and set once a week at the salon.