Dark Spots and Uneven Tone: A K-Beauty Routine Built Around Niacinamide, TXA and Sunscreen

The most common K-beauty routine for dark spots and uneven tone is short: a gentle cleanser, a brightening serum with niacinamide and tranexamic acid (TXA), a moisturizer, and a sunscreen you actually wear every morning. The serum people reach for most often is Anua's Niacinamide 10% + TXA 4%, a 30ml bottle that retailers list as also containing 2% arbutin. Sunscreen is the step that decides whether any of it is worth doing.

A quick note before we start. This is a routine guide, not medical advice. Persistent patches, melasma or anything that looks different from your usual skin are worth showing to a dermatologist, and no serum is a promise of results.

What does a K-beauty routine for dark spots actually look like?

Think of it as four jobs: clean, treat, hydrate and protect. Morning and evening both follow that order, with the only real difference being that sunscreen belongs to the morning and a richer cream can take over at night.

Step one is a gentle cleanser. Dark spots often come with a skin barrier that is already a bit cranky, so a squeaky, stripping wash works against you. A low-foam or creamy cleanser that leaves your face comfortable is the goal.

Step two is a hydrating toner or essence, the classic K-beauty layer. It is not strictly required, but it makes the serum easier to pat in and keeps the whole routine feeling soft rather than sticky.

Step three is the treatment serum, which is where the brightening ingredients live. Step four is a moisturizer to seal things in, and in the morning step five is sunscreen, always last.

What do niacinamide, tranexamic acid and arbutin do in a serum?

Anua's own positioning and retailer listings describe its serum as a tone-evening, dark-spot-focused formula with three headline ingredients. Those are descriptions from sellers and the brand, not independent clinical findings, so read them as what the product is designed to do.

Niacinamide, at 10% here, is the one most listings tie to discoloration and general tone. It is also a very common ingredient across K-beauty, which is why plenty of people already have it somewhere in their shelf.

Tranexamic acid, at 4%, is the ingredient that put this serum on the map for dark-spot shoppers. Listings describe it as aimed at visibly fading existing marks.

Arbutin, listed at 2% by retailers, is described as a melanin-focused brightening ingredient. One listing also mentions hyaluronic acid and ceramides in the formula, which fits the idea of a serum meant to be used daily without feeling harsh.

How do you layer the Anua Niacinamide 10% + TXA 4% serum?

The retailer guidance we found lines up. After cleansing and toner, use two or three drops and pat gently until absorbed. It goes on before any oil or moisturizer, and it can be used morning and evening.

Patch test first, especially if your skin runs sensitive, and stop if you get irritation. If you are new to actives, starting with the evening only and adding mornings after a couple of weeks is a perfectly reasonable way to ease in.

Be patient too. Anything aimed at dark spots is a weeks-to-months habit, not an overnight fix, and reviews you see online are anecdotal. Taking a photo in the same bathroom light once a month is a surprisingly good reality check.

Why is sunscreen the most important step for dark spots?

Because UV exposure is what keeps marks looking stubborn, a brightening serum without daily sunscreen is basically running on a treadmill. Apply it last in your morning routine, use enough to cover your whole face and neck, and reapply if you are outside for long stretches.

A popular pick in the K-beauty world is Beauty of Joseon Relief Sun: Rice + Probiotics, a 50ml SPF50+ PA++++ sunscreen that retailers list with rice extract, niacinamide, ginseng and green tea. It uses chemical filters and is marketed for all skin types, so check the packaging for the full ingredient list if you have sensitivities.

The best sunscreen is genuinely the one you will put on daily, so texture and finish matter more than hype. If a formula pills under makeup or feels greasy, you will skip it, and skipping it undoes the work.

What should you avoid when treating dark spots?

Do not pile on every brightening product at once. A serum, a sunscreen and a moisturizer you tolerate beat a ten-step stack that leaves your barrier irritated, since irritation itself can leave new marks behind.

Skip picking at blemishes too. Many dark spots start as a pimple or a scratch, and prevention is much easier than fading.

Finally, be realistic about the timeline. Give a new routine at least a couple of months before judging it, change one thing at a time so you know what is working, and loop in a dermatologist if the marks are widespread or changing.

The takeaway is pleasantly boring: cleanse gently, use one well-chosen brightening serum, moisturize and wear sunscreen every morning. K-beauty is good at making simple routines feel like a little ritual, and this one is easy to keep up.