I just had the Keratin therapy done on July 14th. Can't believe how nice it stays in the humidity. I just hope it lasts for 3 months, I teach aerobics and work out alot so I wash my hair everyday with Pureology (that is what the salon suggested). I found a place in downtown boston. Beaucage is doing it on Newbury St. Has anyone had it done a second time I am curious to see if it improves or lasts longer if you continue to have it done?