Welcome back to our Best of K-Beauty in 2025 blog series, where we’re revealing the most-loved products of the year based on real customer purchases and repurchase data at Skin Cupid.

In Part 4, we’re spotlighting one of the most powerful steps in any routine: serums. This category is where targeted treatment really happens – from calming inflammation and repairing the barrier to fading pigmentation and improving overall skin tone.

Here are the top three best-selling Korean serums of 2025.

No.3 – GENABELLE PDRN Vita Toning Ampoule

Taking third place is GENABELLE’s PDRN Vita Toning Ampoule, a high-performance formula that delivers visible results without overwhelming the skin. It contains an impressive 5,000ppm concentration of PDRN, an ingredient renowned for supporting skin regeneration and recovery.

What sets this ampoule apart is how it pairs PDRN with encapsulated Vitamins C and E, alongside Tranexamic Acid, allowing the formula to target post-acne marks, dullness, uneven tone, and early signs of ageing all at once. The encapsulation ensures the vitamins remain stable and effective while staying gentle on the skin.

Best for: Post-acne marks, dull or tired-looking skin, uneven tone
Why it stands out: Brightening and repair in one balanced formula

No.2 – SKIN1004 Madagascar Centella Asiatica 100 Ampoule

Coming in second is SKIN1004’s Madagascar Centella Asiatica 100 Ampoule, a product that proves less really can be more. The formula contains just one ingredient – Centella Asiatica extract – and that simplicity is exactly why it’s become a staple in so many routines.

This minimalist ampoule excels at soothing redness, calming breakouts, and supporting barrier recovery without clogging pores or causing irritation. It’s suitable for nearly all skin types but is especially popular with those who have sensitive, acne-prone, or compromised skin.

It’s the kind of serum people keep on hand at all times – whether as a daily staple or a skin-soothing emergency fix.

Best for: Sensitive skin, redness, breakouts, barrier repair
Texture: Lightweight, fast-absorbing, and non-sticky

No.1 – ANUA Niacinamide 10% + Tranexamic Acid 4% Dark Spot Correcting Serum

Taking the number one spot is ANUA’s Niacinamide 10% + Tranexamic Acid 4% Dark Spot Correcting Serum, our best-selling serum of the entire year. This powerhouse formula targets one of the most common skin concerns we see: dark spots and uneven skin tone.

With high-strength Niacinamide, Tranexamic Acid, Arbutin, and multiple forms of Hyaluronic Acid, this serum delivers visible brightening and tone correction while maintaining skin comfort and hydration. Despite its potent ingredient list, it’s well-balanced and non-stripping, which is why so many customers see real, lasting results.

Best for: Hyperpigmentation, dark spots, uneven tone
Why it dominated: Effective, results-driven, and well-tolerated

That concludes Part 4 of our Best of K-Beauty in 2025 blog series. Next up, we’re diving into the moisturisers that shaped your routines this year!