No.3 Skin Softening Serum — Reddit Reviews
by numbuzin
Updated September 2, 2026
Lactic acid serum softens skin and improves texture; can cause irritation and breakouts.
What the community says
This lactic acid serum combines gentle exfoliation and hydrating ferments to smooth skin texture. It's widely loved for adding glow and improving texture, but some users with sensitive or acne-prone skin report breakouts and irritation. Niacinamide content may also be a trigger for some.
What this means for you
Backed by 29 threads from r/AsianBeauty, r/SkincareAddiction and 3 more.
Read the threads ↓What people love
- Softens skin texture while hydrating with ferments and lactic acid
- Helps pores appear smaller and smooths skin under makeup
- Balances glow and hydration without heavy residue
Watch out for
- Breaks out fungal acne-prone and sensitive skin types
- May sting or irritate around mouth or sensitive spots
- Some find niacinamide triggers redness or barrier issues
Product details
Use caution
Skin Type
Product Traits
Key Ingredients
Where to buy
Real Reddit threads — 59 mentions across 29 threads
numbuzin No.3 Skin Softening Serum on Reddit, in one place — 29 threads from r/AsianBeauty, r/SkincareAddiction and 3 more, summarized.
“I was using numbuzin no3 serum before this”
Mentioned
“Haruharu Wonder 2GF Serum”
Mentioned
“💙💙”
Mentioned
“Numbuzin's reformulated #3 serum”
Positive
“Numbuzin #3”
Positive
“numbuzin no. 3. Softening serum.”
Positive
“These products I can't be without.”
Positive
“my skin flares up when I try to substitute them”
Positive
“I just started using it (Numbuzin skin softening serum specifically)”
Cautionary
“but I'm starting to break out as well...”
Cautionary
“because everyone spoke so highly of it”
Cautionary
“Lately I've been enjoying the torriden sunscreen and Numbuzin 3 pore blurring tone up”
Mentioned
“Yes I am very careful to only buy the Korean formulations”
Mentioned
“Ferments - numbuzin no 3 serum and reformulation of the gokujyun premium toner broke me out like crazy”
Cautionary
“So many :') I learned I have super sensitive skin the hard way...”
Cautionary
Dupes & Alternatives
Anua
Azelaic Acid Hyaluron Redness Soothing Serum
Better for Hyperpigmentation
10 shared traits
621 mentions
