@beautyvault29: The key lies in the 5% concentration. Many people think 10% is better — but for Malaysian skin, 5% is the golden concentration. It's enough to see results, yet safe enough for long-term use without worrying about skin damage.YXAJH3964-CCT#serum#niacinamide#acnetreatment#acnefighter️️ #skin#skincare#teashellwhiteningserum#tiktok#Blackheads #whitening #beautyroutine #SensitiveSki#Malaysia#MY#KL#TeashellNiacinamideSerum #NiacinamideSerum