Baby products (eg shampoo) - when to stop?

Good question, I'm also wondering!

My LG has "ekseem" so maybe I should stick to the aqueous a bit longer! ??? What do you ladies think?

I suppose I am the only clueless one in this regard, but here goes:

When does one stop using baby products, eg baby shampoo, baby lotion, etc and move over to the adult versions? I washed Erin's hair with my Brunette Goddess shampoo the other night, just thought "okay, let's see how this looks" and her hair was muuuuch nicer than when I use the J&J... But now I'm wondering, could I be harming her in some way if I continue using the "adult" products?