My MIL is white and she flatirons her hair every single day. When she came to visit this past summer, I began noticing what seemed like thousands of broken-off pieces of hair all over the house. When she left, the amount of hair that I found was astounding- there were even a couple in the fridge! Forget about the guest bathroom- I could have formed a baseball with what I found in there. I just breathed a sigh of relief that it was all her and not meerplexed . Excessive heat, on any head, is bad.