Compatibility and Benefits of Azelaic Acid with other ingredients and comparison with Tranexamic Acid

Based on the information provided:

1. You can use a serum containing Azelaic Acid and then apply sunscreen with Zinc Oxide afterwards. The issue of not being able to use them together only applies when they are in the same formulation, which can cause precipitation. Using them sequentially in different products is fine.
2. Yes, Azelaic Acid can be used together with Resveratrol without any issues.
3. Comparing Azelaic Acid and Tranexamic Acid:
   • Azelaic Acid focuses on acne/oiliness, skin whitening, and improving skin tone.
   • Tranexamic Acid focuses specifically on skin whitening and reducing melasma.