From my personal experience incorporating azelaic acid and retinal into a consistent nighttime routine, I've noticed significant improvements in acne scars and overall skin clarity. Azelaic acid is well-known for its ability to reduce inflammation, fade post-acne marks, and even out skin tone, while retinal (a potent form of vitamin A) accelerates skin cell turnover, promoting smoother and healthier skin. The combination works synergistically, but it's important to introduce them gradually to avoid irritation, especially for sensitive or acne-prone skin. I typically start with applying a 10% azelaic acid booster, such as the one mentioned from Paula’s Choice, followed by a retinal serum in the evening. Moisturizing and calming products like probiotics-cica ampoules help soothe the skin and support barrier repair. Additional items like the KOPHER curepair derma ampoule, milky toners with rice extract, and clarifying pads enriched with TXA (Tranexamic Acid) further enhance brightening effects and skin texture. The neck firming cream and lip replenisher add an anti-aging benefit, which is helpful for those over 35 looking to maintain skin elasticity alongside treating acne scars. In my routine, patience and consistency have been key; visible results typically appeared after several weeks, with a marked reduction in redness and scar visibility. Sunscreen during the day is crucial when using retinal and azelaic acid to protect the skin from UV damage. Overall, this combo is a powerful option for anyone struggling with acne scars and looking for noticeable improvements in their skin’s radiance and smoothness.