Don't beleive these people....hair straighteners do damage hair regardless of whether it is dead, alive or dancing round the kitchen!! Don't get me wrong, I love my hair straighteners and yes my hair always looks in the best possible condition when I use them but they do damage my hair and I do use the best protective serums out. My advice is too use them on special occasions, once a week maybe but not everyday and have your hair cut not longer than 6 weeks