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I want to know that Azelaic Acid can it really be used in cosmetics? And when taking notice, what name do you use when taking notice?

Because I bought the substance to try both Oil Thick Hard and soft, but not even close. So I would like to know what substances have to be put into the formula to get a gel like jelly, press and bounce, not hard or cracked, or worse to look like jelly. Please disturb me. Do I need to use any specifi...