I've been using Dr. Althea's Vitamin C Serum for a few weeks now, and I'm really impressed with the results so far. The texture is lightweight and absorbs quickly without feeling sticky. Most importantly, I've noticed that my dark spots are gradually becoming lighter, which is exactly what I was hoping for. My skin also looks a bit brighter overall. It’s gentle enough for my sensitive skin, and I haven’t experienced any irritation. Definitely a great addition to my skincare routine!