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The pH level of hair is betwen 4.5 and 5.5, the lower end of the scale is acid which makes the hair dry and the higher end of the scale is alkali which makes the hair greasy, I know this because i am at college training in hairdressing.

hope this helps

sue xx

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13y ago

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What is the pH of any hair relaxer?

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Low pH shampoos can be harmful as they may strip the hair of its natural oils, leading to dryness and breakage. They can also cause scalp irritation and disrupt the natural pH balance of the scalp, leading to issues like dandruff or sensitivity. It's important to choose a shampoo that is pH-balanced for healthy hair and scalp.


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Shampoo typically does not contain alkali. Instead, it usually contains surfactants that help to clean the hair by breaking down oil and dirt. Some shampoos may contain mild acids to help balance the pH of the scalp and hair.


How does pH levels of the hair and skin and how acid pH and alkaline pH affect the hair cuticle?

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