Whats the difference between shampoo and conditioner?
Shampoo opens up the hair cuticle (shaft) to allow debris to be cleansed out of it. Conditioner is required to close down this cuticle. The pH of shampoo is slightly alkaline in order to do this. The normal pH of the hair and skin is 4.5-5.5, so the conditioner is usually suited to be of the same acidic level.
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