I love using this serum as hyperpigmentation treatment, and I did notice a difference within 2 weeks, I am so please to keep using it.
Recently I picked at acne on chin, so it left over many acne marks, I quickly grabbed Kiehl's Dark Spot Serum within 6 days, marks have gone perfectly clean, It's great for urgent treatment!!
I have emptied a bottle, I had some dicoloration and found my discoloration unnoticable day after day, skin tone naturely evened, over the course of serum non irritation causing to skin, 5 out of 5.
Kiehl's corrective dark sopt serum has a nice lightweigh consistency for damp skin, it seems working well for post acne, but it has strong scent if you don't mind this probably for you.
Having it twice a day all over my face, my skin is definitely softer and smoother, so far I didn't see sopts fading, maybe time lasts not long enough, I will use to see results in the future.