Cocamidopropyl Betaine - Safe for Eczema?

I have a liquid shampoo formula I would like to produce that is eczema friendly. I am trying to use as few ingredients as possible to reduce the risk of contact dermatitis (since eczema can be allergy-induced).
I also am concerned about using Cocamidopropyl betaine because recently I have read mixed thoughts about it being a harsh chemical.
Do any of you have scientific data I can read instead of the personal opinion posts on the internet?
Thank you.


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