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What is the pH level of the hair?

The pH of healthy hair is around 4.5 to 5.5, which is slightly acidic. This acidity helps to protect the hair cuticle and maintain the hair's natural moisture balance. However, certain hair treatments and products, such as hair dyes and relaxers, can change the pH of the hair and cause damage. It is important to use products that are formulated for the pH of the hair to maintain its health.

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