What is the natural pH of the hair and skin?

The pH of hair, skin, and nails is 4.5 - 5.5.

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4.5 is almost the pH of draino, i think who ever said it was 4.5

• 5.5 is way off their nut.

here's a tip, talk to your doctor or google it or even look up the epidermis and hair on wikipedia.