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pH balance

Potential Hydrogen - measures the acidity or basicity of a solution. Solutions with a pH level less than 7 are acidic and those with a pH level greater than 7 are basic. Acids will harden the hair while basics will expand and soften the hair. Because of this, many shampoos and conditioners are pH balanced (pH level 4-6) to match the natural pH level of the hair and skin.

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