I'm also wondering about something else. A couple people have mentioned the treatment doesn't last as long if you work out a few days a week and your hair gets sweaty. Can anyone tell me how long the treatment will last if your hair gets sweaty, say, 4-5 days per week? Also, I know that the less frequently you wash your hair, the longer it will last. But I need to wash my hair every time I work out so...with the sweating and the frequent washing combined...I'm thinking the treatment might wear off so quickly it won't be worth my money.