Lykkers, getting rid of acne was only half the battle for me. Once the breakouts started calming down, I was left with something almost as frustrating—dark spots and post-acne marks that seemed to stick around forever.

I tried to be patient, but every time I looked in the mirror, those marks were all I could see. Over the past few months, I've tested quite a few brightening serums, and these are the ones that made the biggest difference in my routine.

1. Anua Niacinamide 10% + TXA 4% Serum — 9/10

This was one of the first serums I added when I started focusing on post-acne marks. The texture is lightweight and easy to layer, so it never felt like a chore to use. I applied it consistently, and after a few weeks, I started noticing that some of my newer marks looked less noticeable.

What I liked most was how balanced it felt. My skin looked brighter over time, but the formula never felt overly aggressive. The reason I'm giving it a 9/10 is because it worked steadily rather than dramatically. It's a serum that rewards consistency, and I found myself reaching for it almost every day.

2. Numbuzin No.5+ Serum — 10/10

Out of all the serums I've tried for dark spots, this one impressed me the most. I remember taking progress photos a few weeks apart and actually noticing a difference, which doesn't happen often with skincare. My post-acne marks looked softer, and my overall complexion seemed brighter and more even. The formula feels comfortable on my skin, and I never felt the need to simplify the rest of my routine while using it.

This is one of those products that made me excited to keep using it because I could genuinely see gradual improvements over time. For me, it easily earns the top spot.

3. Haruharu Wonder Centella 4% TXA Serum — 8.5/10

This serum felt more gentle and calming compared to the others. While I didn't see results quite as quickly, I really enjoyed how comfortable my skin felt while using it. Whenever my skin seemed a little irritated or stressed, this was the serum I felt most confident reaching for.

The brightening effects were definitely there, but they appeared more gradually in my experience. What stood out most was how balanced and healthy my skin looked overall. I would recommend this one to anyone who prefers a gentler approach and doesn't mind waiting a little longer for results.

The Anua serum helped steadily fade newer marks, Numbuzin No.5+ gave me the most noticeable results, and Haruharu Wonder was the gentlest option in my routine. If I had to repurchase only one right now, it would probably be the Numbuzin No.5+—it's the serum that made me do a double take when comparing before-and-after photos.