Tranexamic Acid Niacinamide Serum — Reddit Reviews
by Cos De BAHA
Updated November 10, 2026
5% tranexamic acid plus 5% niacinamide fades post-inflammatory hyperpigmentation; sticky finish.
What the community says
Redditors use this 5% tranexamic acid and 5% niacinamide serum for post-inflammatory hyperpigmentation, sunspots, and old breakout marks, often alongside azelaic acid or tretinoin. It hydrates dehydrated skin, but the aloe-based texture feels sticky and greasy to some users.
What this means for you
Backed by 15 threads from r/AsianBeauty, r/SkincareAddiction and 3 more.
Read the threads ↓What people love
- 5% tranexamic acid plus 5% niacinamide
- PIH fading reported within 2–3 months
- Hydrating, slippy texture
Watch out for
Product details
Based on limited Reddit discussion so far
Where to buy
What the science says
Tranexamic acid has some evidence for fading melasma and other dark patches, and most of its 19 studies found benefit 1. Niacinamide has some evidence for fading facial dark spots, and skin looked lighter as the spots faded 2. For acne, niacinamide has some evidence of helping, though some research found the results uncertain 3. Niacinamide has some evidence for signs of aging, with studies reporting firmer skin and fewer wrinkles 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 · 15
Cos De BAHA Tranexamic Acid Niacinamide Serum ingredients
*Aloe Barbadensis Leaf Ext., Tranexamic Acid, Niacinamide, Glycereth-26, Betaine, Propanediol, 1,2-Hexanediol, Sodium Hyaluronate, Allantoin, Xanthan Gum, Citric Acid, *Camellia Sinensis Leaf Ext, *Sambucus Nigra Flower Ext, *Momordica Charantia Fruit Ext, *Leontopodium Alpinum Ext
Listed in label order, highest concentration first. Linked ingredients have their own page.
Real Reddit threads — 18 mentions across 15 threads
Cos De BAHA Tranexamic Acid Niacinamide Serum on Reddit, in one place — 15 threads from r/AsianBeauty, r/SkincareAddiction and 3 more, summarized.
“-Cos De BAHA Tranexamic Acid Niacinamide serum”
Mentioned
“I also always repurchase both Cosrx snail goodness, Cos de Baha tranexamic, and that Soon Jung Barrier Cream 😍”
Mentioned
“I love hauls like thesssseeeeee! Pls review the BoJ products and the Cos de Baha ones 🙏”
Mentioned
“Cos De Baha TN Tranexamic Acid Niacinamide serum x7”
Mentioned
“I have oily but very dehydrated prone skin with eczema and PIH.”
Mentioned
“Here's mine:”
Mentioned
“Cos De Baha Tranexamic Acid Niacinamide serum: fades PIH so well with some oil control”
Positive
“Cos de Baha's Tranexamic Acid for the day as it is SUPER hydrating and slippy while providing a healthy appearance the whole day”
Positive
“- Cos de Baha tranexamic acid, pyungkang yul essence toner and clinique 72 hour hydrator”
Positive
“cos de baha tranexamic/niacinamide serum -finacea azelaic acid 15%”
Mentioned
“cos de baha niacinamide/tranexamic serum or jumiso snail peptide 95 or both”
Mentioned
“Cos De Baha Tranexamic Acid Niacinamide serum should be an upgrade from the Hada Labo Shirojyun bcs i did the exact same thing.”
Positive
“It brightens the hyperpigmentation even faster (should see 80%-90% fading by the second month).”
Positive
“With the Hada Labo, it takes 3 months or more”
Positive
“Cos De BAHA TN Tranexamic Acid Niacinamide Serum”
Mentioned
“And my complete current routine is the following”
Mentioned
Dupes & Alternatives
Anua
Azelaic Acid Hyaluron Redness Soothing Serum
Better for Hyperpigmentation
5 shared traits
781 mentions