Anne:

When hair follicles are clogged, bacteria creates crusty flakes on the scalp. If hair is deprived of oil, it falls out and breaks more easily, resulting in hair loss and possibly baldness. Rinsing your scalp with apple cider vinegar and water mixture can rid you of the bacterial causes of hair loss.
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https://www.amazon.com/author/bonnie.mill-lemke
https://kdp.amazon.com/en_US/bookshelf