1.  Azelaic Acid  is used to treat mild to moderate acne, both comedonal acne and inflammatory acne. It belongs to a class of medication called dicarboxylic acids. It works by killing acne bacteria that infect skin pores. It also decreases the production of keratin, which is a natural substance that promotes the growth of acne bacteria.

2.  Azelaic Acid  has been used for treatment of skin pigmentation including melasma and post inflammatory hyperpigmentation, particularly in those with darker skin types. It has been recommended as an alternative to HQ. As a  tyrosinase  inhibitor, azelaic acid reduces synthesis of  melanin .

3.  Azelaic Acid  can inhibit microbial protein synthesis, so for Propionibacterium acnes and Staphylococcus epidermidis have antibacterial activity, can be used as anti-acne drug.
4.  Azelaic Acid  is or zinc salts, and vitamin B6 compatibility, can be used for hair care products for men, hair loss disease etc.