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1
Calm, Clear, and Balanced Skin Starts Here
Take control of breakouts, redness, and uneven tone with the TIRTIR Azelaic Acid 12% Serum—a targeted treatment serum powered by 12% Azelaic Acid, Zinc PCA, and Panthenol. Clinically proven to hydr...
Reviews
4.8
67 ratings
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My skin looks great
I bought this for my son’s acne. And it really helped. I decided to try it on my face I I have been getting compliments because of my skin looks so clear of red marks and dark spots.
A
Anna · May 21, 2026
Effective
I started using the TIRTIR Azelaic Acid 12% Serum to help with underarm and post-irritation discoloration, and overall I found it to be a gentle but effective brightening treatment. The texture is lightweight and absorbs quickly without leaving a sticky residue, making it easy to layer with moisturizer or deodorant afterward.
After about 2–4 weeks of consistent use, I noticed gradual improvement in skin tone and reduced redness. The formula felt soothing rather than irritating, which is important for sensitive areas like the underarms. Azelaic acid at 12% is a good strength for targeting post-inflammatory