Choosing between 5% and 10% niacinamide is not just a percentage question. A useful comparison also looks at what else is in the formula and whether the product is a leave-on serum or a toner pad. Those details affect where it fits in a routine and whether its format matches the areas you want to address.
For shoppers comparing the two disclosed concentrations here, the clearest difference is straightforward: the 10% option is an ampoule/serum labeled with niacinamide and TXA, while the 5% option is a toner pad that combines niacinamide, TXA, Pink Vitamin B12, and PHA. Neither percentage alone establishes how a formula will feel on an individual person's skin or how quickly visible dark spots will change.
Recommendation: compare concentration and format together
| Buyer criterion | 10% leave-on serum | 5% leave-on toner pad |
|---|---|---|
| Disclosed niacinamide | Labeled “NIACINAMIDE 10 + TXA 4” | 50,000 ppm niacinamide (5%) |
| Product format | Ampoule/serum | Toner pad |
| Other disclosed formula details | TXA 4 | TXA, Pink Vitamin B12, and PHA |
| Format-specific detail | No applicator detail is listed | Half-moon pad designed for the under-eye and cheekbone area |
| Listed price | $24 | $23 |
The concentration difference is real, but it is only one part of the purchase decision. Choose the 10% route when you specifically want the higher disclosed niacinamide level in a serum format. Choose the 5% route when a toner-pad format and the pad's disclosed supporting ingredients and targeted shape are more relevant to your routine.
The 10% serum: higher disclosed niacinamide in an ampoule format
Anua Niacinamide 10 TXA 4 Serum for Brightening and Dark Spots is categorized as an ampoule/serum and labeled “NIACINAMIDE 10 + TXA 4.” For a buyer conducting a 5% and 10% niacinamide leave-on formula comparison, that gives it a clear place: it is the higher-concentration option in a serum format rather than a pre-soaked pad.
Its listed price is $24. The product page also lists SPF 50, Broad Spectrum SPF 50, water resistance for 80 minutes, “Melting Collagens 99%,” and “Melting PDRN 1%.” These claims are substantial enough to verify on the current product page and directions before purchase, particularly if you are deciding where the product belongs in your existing daytime routine.
The available product details do not set out a routine frequency, an introduction schedule, or compatibility instructions for vitamin C, retinoids, exfoliating acids, or benzoyl peroxide. Buyers planning to combine several active products should use the brand's directions and check the complete ingredient information rather than relying on concentration alone.
The 5% toner pad: a different formula and application format
Anua Niacinamide 5 TXA Brightening Pad discloses 50,000 ppm niacinamide, or 5%, and is categorized as a toner. Its formula is described as combining niacinamide, TXA, Pink Vitamin B12, and PHA to help visibly brighten dull-looking skin, improve the appearance of uneven tone, and support a smoother, hydrated look.
This is not simply a lower-strength version of the Anua serum. The pad changes the routine format as well as the concentration. It has a half-moon shape designed to adhere along the under-eye and cheekbone area. That design may matter more than the percentage for someone who wants a pad specifically shaped for those areas.
The pad is listed at $23, one dollar below the serum's listed $24 price. The small price difference makes format, ingredient mix, and preferred application style more useful decision points than price alone.
What the percentage can and cannot tell you
A 10% label tells you the serum has a higher disclosed niacinamide concentration than the 5% pad. It does not, by itself, tell you which product will be more suitable for dry, sensitive, redness-prone, oily, or blemish-prone skin. It also does not establish a result for pores, wrinkles, texture, or a timeline for dark-spot improvement.
The formula context differs:
- The Anua 10% serum is labeled with niacinamide and TXA 4 in an ampoule/serum category.
- The Anua 5% pad includes TXA, Pink Vitamin B12, and PHA and is described as gentle.
- The pad's half-moon shape adds a placement consideration that a conventional serum comparison does not capture.
For dark spots and uneven tone, a concentration-first shopper may start with the 10% serum. A format-first shopper may find the 5% pad easier to evaluate because it states both its toner-pad category and its intended half-moon-zone fit. In either case, review the full product directions and ingredients before adding it alongside other leave-on treatments.
Serum versus pad: routine placement is the practical trade-off
A serum and a toner pad are different product categories, so comparing them only by 5% versus 10% can hide the more useful choice. The serum is an ampoule/serum, while the pad is a toner. If your routine already has a toner step and you want a pre-soaked pad, the 5% format is the direct match. If you are looking specifically for an ampoule/serum with the higher disclosed niacinamide level, the 10% format is the closer match.
The pad also makes a more specific application claim: its half-moon shape is designed for adherence around the under-eye and cheekbone area. That is a format feature, not proof that it will outperform a serum for dark spots. It does, however, give buyers a concrete reason to prefer the pad when those areas are their application focus.
Decision rule: choose the format first, then the percentage
Choose the Anua Niacinamide 10 TXA 4 Serum for Brightening and Dark Spots if your priority is a serum-format leave-on product with the higher disclosed 10% niacinamide level and the “NIACINAMIDE 10 + TXA 4” label. Before buying, verify the current instructions and how the listed SPF 50 and water-resistance claims are meant to be used within your routine.
Choose the Niacinamide 5 TXA Brightening Pad if you want a 5% niacinamide toner pad with TXA, Pink Vitamin B12, and PHA, especially if its half-moon shape suits the under-eye and cheekbone area. Its gentler formula description is relevant, but it is not a substitute for checking the full ingredient list and directions if sensitivity is a concern.
The best comparison is therefore not “Is 10% always better than 5%?” It is: do you want the higher disclosed concentration in a serum, or a 5% toner pad with a different supporting formula and a targeted application shape?