Tranexamic Acid 10% Serum — Reddit Reviews
by Cos De BAHA
Updated November 10, 2026
10% tranexamic acid fades marks, Reddit reports; studies find niacinamide acne results uncertain.
What the community says
This is a high-strength tranexamic acid serum with 2% niacinamide, aimed at post-acne marks and uneven pigmentation. Redditors report fading and soothing, while studies find niacinamide’s acne results uncertain; the sticky, sometimes irritating texture can derail consistent use.
What this means for you
What people love
- 10% tranexamic acid for fading dark marks
- Aloe-like slip; hydrates and layers under SPF or makeup
Watch out for
Product details
Where to buy
What the science says
Tranexamic acid has some evidence for fading melasma, a brown patchy skin condition, and most studies found it helped when used alone 1. Niacinamide has some evidence for fading facial dark spots, and all four studies that tested it directly found improvement 2. For acne, niacinamide has some evidence, since most studies found it helped and it often worked about as well as clindamycin applied to the skin 3. Niacinamide also has some evidence for firmer, more elastic skin with fewer wrinkles, though only two studies tested it directly 4.
- Tranexamic Acid for hyperpigmentation Some evidence · 19 studies
- Niacinamide for hyperpigmentation Some evidence · 17 studies
- Niacinamide for acne Some evidence · 17 studies
- Niacinamide for anti-aging Some evidence · 8 studies
Research context, not treatment advice. Studies are about the ingredient, not necessarily this exact product.
How we grade researchFull ingredient list · 30
Cos De BAHA Tranexamic Acid 10% Serum ingredients
Centella Asiatica Extract, Tranexamic Acid (10%), Butylene Glycol, Glycerin, Niacinamide (2%), Isononyl Isononanoate, 1,2-Hexanediol, Aloe Barbadensis Leaf Extract, Panthenol, Allantoin, Dipotassium Glycyrrhizate, Sodium Hyaluronate, Tocopheryl Acetate, Camellia Sinensis Leaf Extract, Sambucus Nigra Flower Extract, Momordica Charantia Fruit Extract, Leontopodium Alpinum Extract, Epigallocatechin Gallate, Glutathione, Madecassoside, Cetearyl Olivate, Sorbitan Olivate, Cetearyl Alcohol, Caprylic/Capric Triglyceride, Caprylyl Glycol, Tropolone, Dimethicone, Carbomer, Xanthan Gum, Tromethamine
Listed in label order, highest concentration first. Linked ingredients have their own page.
Real Reddit threads — 84 mentions across 28 threads
Cos De BAHA Tranexamic Acid 10% Serum on Reddit, in one place — 28 threads from r/SkincareAddiction, r/tretinoin and 5 more, summarized.
“Cos de Baha Tranexamic Acid serum (tranexamic + niacinamide) is one of the generic options I would suggest”
Mentioned
“and can certainly be used with retinoids comfortably.”
Mentioned
“Ideally ... you would cleanse, apply the cos de baha tranexamic serum, moisturize on damp skin.”
Mentioned
“I'm trying out the cos de baha AZ20 with 20% azelaic acid.”
Mentioned
“Think it's going well so far, but I've only started introducing it two weeks ago”
Mentioned
“- cos de baha AZ15.”
Positive
“- cos de baha Az15.”
Positive
“My full routine is:”
Positive
“The serum is so soothing for my redness/acne/eczema and truly feels hydrating too, it kinda has an aloe vera like slip when applied and works well under my SPF/makeup.”
Positive
“Cos de Baha: been using this now for two weeks since I came back from my trip. It has a nice slip to it when put on damp skin, sinks in quickly without leaving tacky feel, and I have noticed that my skin texture looks smoother and pores appear smaller.”
Positive
“can you plss give reviews for cos de baha az serum”
Positive
“when their prices started climbing, I personally switched to Cos de Baha and have been very pleased with their niacinamide and TXA serums.”
Positive
“- Cos de Baha (serums),”
Positive
“For people into K- or Asian beauty, here are few brands I've personally used and liked:”
Positive
“I love the Cos de Baha Azalaic acid serum”
Positive
“comes in 5% and 10%.”
Positive
“I see immediate results in soothing redness.”
Positive
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