Niacinamide (vitamin B3) is a versatile ingredient with proven effectiveness in treating acne and reducing post-inflammatory hyperpigmentation (PIH). It helps balance sebum production, limiting the formation of new blemishes. Niacinamide inhibits the transfer of melanin from melanocytes to keratinocytes, causing pigment spots after inflammation to gradually fade and the skin tone to become more even. Additionally, it actively strengthens the skin barrier, reduces redness, and contributes to a refined skin texture and resilience, aiming to promote a more stable, calmer complexion.