Anua Niacinamide 10 + TXA 4 Serum
Top PickWhat We Like
- Three brightening actives at stated strengths
- Watery and fragrance-free, layers under sunscreen
- Aimed squarely at post-acne marks and sun spots
Worth Noting
- Smallest serum bottle in this guide
- Breakouts on skin that can't take 10% niacinamide
- Size
- 1.01 fl oz
- Texture
- Watery, fast-absorbing
- Fragrance
- Fragrance-free
- Key Actives
- 10% niacinamide, 4% tranexamic acid, 2% arbutin
Three actives at strengths the label actually states — 10% niacinamide, 4% tranexamic acid, 2% arbutin — is the reason this is the bottle we hand someone who can point at the mark bothering her. Most brightening serums here lead with vitamin C and treat pigment as a bonus; this one is built the other way round, and it shows in what we watched for: brown marks left behind by breakouts, sun patches at the temples, the uneven band along the jaw. Of everything in this guide, it is the most directly aimed at discoloration.
A drop or two is the whole dose. The liquid is thin and watery, it sinks in during the time it takes to screw the dropper back on, and it leaves a faint tackiness for a minute — the one thing about it we minded. Apply it before moisturizer and the feeling is gone before you leave the bathroom.
Two things to know before you commit. The bottle is the smallest of the serums here, so the cost per ounce is higher than the shelf price suggests and it will run out well before a two-ounce serum does. And 10% niacinamide is a real strength: if your skin has ever reacted to a brightening product, start every other night for two weeks rather than going twice daily from day one.
If the problem is a whole face that photographs gray, TruSkin's vitamin C suits better. If it's three specific marks you've been color-correcting under concealer for a year, this is the one to buy.
Bottom line: The most targeted dark-spot formula in this guide, with three stated actives and no fragrance — worth the small bottle.