Oh, I miss Aeon sometimes! They have almost everything. However, every time I went to Aeon, I lost all of my energy because they have too much stuff and noise. I still miss it though.
Yes, when I switched to a soap bar from shampoo, my hair became super greasy and dry. A few months later, my hair became much nicer. Your friend is right. I think our body will adapt easily. These days, there are many nice liquid organic shampoos as well. I just noticed that if I don't use many chemical products, I don't need to buy products much. That was an interesting satori moment for me. I think I was brainwashed to buy many products by commercials or something!