No.3 Skin Softening Serum — Reddit Reviews
by numbuzin
Updated November 10, 2026
Niacinamide-ferment serum smooths texture and boosts glow; breakout risk for some.
What the community says
A niacinamide serum built around bifida and galactomyces ferments, with squalane and sodium hyaluronate for a cushioned, glowy finish. Texture-focused routines love it, but ferment-sensitive or acne-prone users report itchy bumps and breakouts.
What this means for you
What people love
- Niacinamide plus ferments target uneven texture and tone
- Softens skin enough to help makeup sit smoothly
Watch out for
- Ferments trigger itchy bumps or major breakouts for some
- Niacinamide can be a deal-breaker for reactive acne-prone skin
- Texture improves more reliably than pore size
Product details
Use caution
Product Traits
Key Ingredients
Where to buy
What the science says
Niacinamide has some evidence for fading dark spots, as all four direct studies found it helped and it beat a moisturizer without it 1. Acne research has some evidence behind it: most studies found it helped, often about as well as clindamycin applied to skin 2. Its anti-aging support has some evidence too, with studies reporting firmer skin and fewer wrinkles 3. For the skin barrier, the evidence is not proven yet, with just one study showing less water loss 4.
- Niacinamide for hyperpigmentation Some evidence · 17 studies
- Niacinamide for acne Some evidence · 17 studies
- Niacinamide for anti-aging Some evidence · 8 studies
- Niacinamide for skin barrier Not proven yet · 17 studies
Research context, not treatment advice. Studies are about the ingredient, not necessarily this exact product.
How we grade researchFull ingredient list · 28
numbuzin No.3 Skin Softening Serum ingredients
Bifida Ferment Lysate, Galactomyces Ferment Filtrate, Butylene Glycol, Methyl Gluceth-20, Water, Niacinamide, PEG-90, 1,2-Hexanediol, Glycerin, Squalane, Alteromonas Ferment Extract, Silk Extract, Goat Milk Extract, Sodium Hyaluronate, Panthenol, Adenosine, Glycereth-26, Xanthan Gum, Polyglyceryl-3 Distearate, Glyceryl Stearate SE, Glyceryl Stearate Citrate, Polyglyceryl-3 Methylglucose Distearate, Carbomer, Tromethamine, Ethylhexylglycerin, Caprylyl Glycol, Tropolone, Disodium EDTA
Listed in label order, highest concentration first. Linked ingredients have their own page.
Real Reddit threads — 71 mentions across 30 threads
numbuzin No.3 Skin Softening Serum on Reddit, in one place — 30 threads from r/AsianBeauty, r/40plusskincare and 4 more, summarized.
“I was using numbuzin no3 serum before this”
Mentioned
“Haruharu Wonder 2GF Serum”
Mentioned
“💙💙”
Mentioned
“-Numbuzin #3 Skin Softening Serum”
Positive
“AM: -Vitamin C serum -Numbuzin #3 Skin Softening Serum - Sunday Riley Good Genes”
Positive
“Over time built up the routine cautiously to ensure the skin could handle everything that was thrown at it”
Positive
“your description of its effect reminds me of what Numbuzin no 3 pore minimising serum did for my skin.”
Positive
“it does still have that effect…”
Positive
“Wish so bad I didn’t have fungal acne so I could try that serum”
Positive
“Numbuzin's reformulated #3 serum”
Positive
“Numbuzin #3”
Positive
“Kuramoto bijin ferment emulsion or shiro sake lotion and numbuzin no. 3. Softening serum.”
Positive
“These products I can't be without.”
Positive
“Oily, sensitive acne prone skin girlie right here.”
Positive
“I just recently started using no3 and I'm very impressed! I use it at night, and I definitely can tell my skin is softer in the morning.”
Positive
“so far I love numbuzin No. 3 Skin Softening Serum”
Positive
Dupes & Alternatives
Anua
Azelaic Acid Hyaluron Redness Soothing Serum
Better for Hyperpigmentation
12 shared traits
781 mentions
