eli5: What is it in “adult” shampoos that makes our eyes hurt and how exactly are kids shampoos formulated to be “eyefriendly”?
In: Chemistry
Baby shampoo has a more neutral pH than adult shampoo. This means it’s more gentle than adult shampoo, which is somewhat alkaline. The pH of baby shampoo is close to the pH of the tears of the eyes so it doesn’t burn because it mimics the pH of tears. Baby shampoo is not very strong cleanser wise, but babies don’t work construction and get all sweaty so they just need a mild soap. Adult shampoo is harsher to remove more dirt and grease.
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