Q&A: Questions about Azelaic Acid?

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In the December Q&A, Kristina asked, Hi Susan!! I have a question about azelaic acid. In your blog post #alltheingredients: Azelaic Acid, you note that it is recommended that it be added to the cool down phase below 40˚C, but earlier in the post you note that Corum states that it has a melting point…

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