Feel free to contact me if you have any questions about buying ingredients from Taobao, I am Chinese, while a great place you should go is traditional Chinese medicine store (physical store) in which you can buy tons of different types of herb that can turn into the ingredients of your cream shampoo..etc. You may also become quite obsessed in the traditional medicine through the experimention of these raw herbal ingredients.
I suppose the majority of them are ok,
Medicine store are mostly located along the main street, many of them both sell western and Chinese medicine, also there are some stores specifically sell Chinese herb
would you like to leave an email address,I can leave some store’s names/ pics/ streets…. etc for you after consulting my friend who is always in sick and be healed by herbs