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Hair

Q.   I keep hearing about pH balanced shampoo? What does pH mean?
A.   Alkalies and acids have different effects on the hair. Acids will harden and contract the hair, while alkalies expand and soften the hair shaft. Hair and skin has a pH level of between 4.5 and 5.5 (an average of 5), and any application of acidic and alkaline compounds can raise or lower the pH levels of the hair causing physical changes. Shampoos, conditioners and other chemical hair products use acids and alkalis to affect changes in the hair.