Which ingredient is known for its effectiveness in helping with acne scarring?

Niacinamide is particularly effective in helping with acne scarring due to its multifaceted benefits for skin health. It possesses anti-inflammatory properties that can calm redness and irritation associated with acne lesions, promoting a more even skin tone. Additionally, niacinamide helps to enhance the skin's barrier function, which can improve moisture retention and reduce transepidermal water loss. This hydrating effect aids in the healing process, thereby minimizing the appearance of scars.

Furthermore, niacinamide can improve skin texture and pigmentation irregularities over time, making it a valuable ingredient in addressing acne scars. Regular use can lead to a reduction in the size of pores and an overall improvement in skin clarity.

While other ingredients such as retinol and glycolic acid also contribute to skin regeneration and texture improvement, niacinamide stands out for its ability to specifically target post-acne marks and scars in a gentle manner suited for various skin types, including sensitive skin.