wow so interesting! when I was looking up the spelling of betaine in English I saw that some people find it irritating which surprised me. Personally I am SOOO sensitive to a lot of skincare products, pretty much anything that has an artificial scent will make me break out or have welts on my skin. So it is very interesting that cocamidopropyl betaine has that affect for some people. I am far from a recipe I am happy with. In fact this recipe is not the best shampoo I have ever made, but rather I wanted to share about how I am trying to use the ingredients I have in my apothecary already before going out to buy anything new.
and by the way, I would love to hear about your shampoo recipe, if you feel like sharing definitely tag me in the post!