For a dark-spot routine, 10% niacinamide is not automatically the better purchase than 5%. The useful comparison is broader: check how the concentration is labeled, whether the formula also includes TXA, and whether you want a serum step or a pad designed for a particular area of the face.
The two Anua products here take different routes. One is an ampoule/serum labeled NIACINAMIDE 10 + TXA 4. The other is a toner pad with 50,000 ppm niacinamide—equivalent to 5%—plus TXA, Pink Vitamin B12, and PHA. Their listed prices are close, at $24 USD and $23 USD respectively, so format and companion ingredients are likely more useful tie-breakers than price alone.
Recommendation: choose concentration after checking the format and formula
A percentage tells you the labeled amount of one ingredient. It does not, on its own, tell you how a product will fit around your other steps, where it is intended to sit on the face, or whether it has additional brightening-focused ingredients.
For this 5% and 10% niacinamide concentration comparison, use three criteria:
- Labeled niacinamide level: The serum label states 10, while the pad lists 50,000 ppm, or 5%.
- TXA pairing and additional ingredients: Both products include TXA, but the pad also lists Pink Vitamin B12 and PHA.
- Application style: One is categorized as an ampoule/serum; the other is a toner pad in a half-moon shape for the under-eye and cheekbone area.
These are two formats rather than two otherwise identical formulas. That means the decision should not be framed as a pure concentration test.
5% vs. 10% at a glance
| Buyer criterion | 10% serum | 5% toner pad |
|---|---|---|
| First product mention | Anua Niacinamide 10 TXA 4 Serum for Brightening and Dark Spots | Anua Niacinamide 5 TXA Brightening Pad |
| Niacinamide label | “NIACINAMIDE 10 + TXA 4” | 50,000 ppm niacinamide, equivalent to 5% |
| TXA | Listed as “TXA 4” on the label | TXA is listed in the formula |
| Other listed formula details relevant here | No additional brightening-focused ingredients are specified in the supplied product details | Pink Vitamin B12 and PHA are listed alongside niacinamide and TXA |
| Product category | Ampoule/serum | Toner |
| Application cue | Serum format | Half-moon pad designed to adhere along the under-eye and cheekbone area |
| Listed price | $24 USD | $23 USD |
The 10% option: a serum format with TXA on the label
The Anua Niacinamide 10 TXA 4 Serum for Brightening and Dark Spots is categorized as an ampoule/serum. Its label states NIACINAMIDE 10 + TXA 4, making it the higher labeled niacinamide option in this comparison.
This is the clearer fit for someone who specifically wants a serum-format leave-on product with 10% niacinamide named on the label and TXA included alongside it. The listed price is $24 USD.
The product page also states SPF 50, Broad Spectrum SPF 50, and water resistance for 80 minutes. Because preventing further sun exposure is a practical concern in a discoloration routine, those are important label details to read carefully before purchase. Confirm the product’s official directions and the full packaging information for how those sunscreen statements apply within your routine.
The 5% option: a targeted toner-pad format with additional listed ingredients
The Anua Niacinamide 5 TXA Brightening Pad is categorized as a toner and lists niacinamide at 50,000 ppm, which is 5%. It combines niacinamide and TXA with Pink Vitamin B12 and PHA.
Its distinguishing feature is not concentration alone. The pad has a half-moon shape designed to adhere along the under-eye and cheekbone area. For a buyer who wants a pad format and is focused on those areas, that placement cue may matter more than moving from 5% to 10% niacinamide.
Anua describes the formula as gentle and says it is intended to help visibly brighten dull-looking skin, improve the appearance of uneven tone, and support a smoother, hydrated look. Those are product claims rather than a direct comparison with the serum, so they do not establish that the 5% pad will outperform a 10% serum for dark spots. The listed price is $23 USD.
How TXA pairing changes the comparison
Both options pair niacinamide with TXA, so the choice is not between niacinamide alone and a multi-ingredient formula. The difference is how each product presents that pairing.
- The serum label explicitly states NIACINAMIDE 10 + TXA 4.
- The pad lists 5% niacinamide, TXA, Pink Vitamin B12, and PHA.
For buyers comparing labels, this means the serum gives a direct higher-niacinamide option with TXA named in the product label. The pad offers a lower labeled niacinamide level in a formula that also lists PHA and Pink Vitamin B12. Neither product detail supplied here establishes which combination works faster, produces larger changes in dark spots, or is better tolerated by a particular skin type.
If you are already using retinol, vitamin C, exfoliating acids, or another leave-on treatment, do not assume either format has been tested for that exact combination. Check the full product directions and ingredient list before adding another active-containing step.
Serum or toner pad: application style is a real deciding factor
A serum and a toner pad can occupy different places in a routine, even when both contain niacinamide and TXA. The available product information supports a format comparison, not a claim that one application style is inherently more effective.
Choose the serum if your main buying requirement is a 10% niacinamide label in an ampoule/serum format. It is the more direct match when the concentration itself is your priority.
Consider the toner pad if you prefer a toner-format product and value the half-moon pad shape for placement along the under-eye and cheekbone area. Its formula also lists PHA and Pink Vitamin B12, which are relevant formula differences to review rather than extras to ignore.
The pad listing includes a claim that using products together improved the appearance of skin clarity by 1.56 times compared with using the pad alone. The supplied details do not identify the companion product in this comparison or provide the study conditions, so that figure should not be used to predict a result from the pad alone.
Decision rule: pick the product that matches the step you need
Choose the 10% Niacinamide 10 TXA 4 Serum when you want the higher labeled niacinamide concentration, TXA named on the label, and an ampoule/serum format. Its $24 USD listed price is only $1 above the pad.
Choose the 5% Niacinamide 5 TXA Brightening Pad when a toner pad is the better fit for your routine, especially if the half-moon shape for the under-eye and cheekbone area is useful to you. It lists 5% niacinamide with TXA, Pink Vitamin B12, and PHA at $23 USD.
Before buying, verify the current ingredient list, directions, and sunscreen labeling on the official product page. For dark-spot shoppers, the most practical choice is not simply 5% versus 10%; it is the concentration, companion ingredients, and leave-on format you can place appropriately within your existing routine.