How do you like 'em Apples?

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For the past couple of weeks, a friend recommended to me that I should try rubbing some apple vinegr to my hair before washing it to reduce the amount of white flakes as well as reduce the itchiness on my scalp. I'm kind of doubting this, but it also feels like a legitimate method. She says that youndon't need an expensive apple vinegar brand, though she said that she has been using it foe quite some time and it's been helping her out a lot. This almost feels like a prank.. Especially since she started telling me about this at the beginning of April.. Is this a prank or something helpful?