Cosmetics Formulation Development

1. Azelaic Acid is incompatible with zinc. azelaic and leave it for a while, can you apply a zinc-containing sunscreen like this? 2. Azelaic Acid used with Resveratrol or not? 3. Between Azelaic Acid with Tranexamic Acid What are the advantages and disadvantages compared to each other? I will use it as information to make a purchase decision. Thank you.

Hello. 1. You can do it without any problem. Inability to use together in this case only in the same formula This will cause the problem of sedimentation of the substance. but if you continue to apply the skin in each formula No problem 2. No problem 3. Azelaic Acid focuses on acne/oily skin/whiteness while Tranexamic Acid will focus on the white / reduce melasma only. only