Niacinamide 20 Serum — Reddit Reviews
by Jumiso
Updated July 29, 2026
High 20% niacinamide dose targets stubborn hyperpigmentation faster than typical 5% formulas
What the community says
This 20% niacinamide serum is a K-beauty staple known for fading hyperpigmentation quickly and lightening acne marks, but its high concentration can cause irritation, especially on sensitive or dry skin.
What this means for you
What people love
- High 20% niacinamide dose targets stubborn hyperpigmentation faster than typical 5% formulas
- Lightweight, non-greasy texture suitable for layering in AM routines
- Some rosacea sufferers report use without irritation
Watch out for
- 20% concentration is often too strong and can cause stinging, flushing, or purging especially if skin barrier is compromised
- Reported mixed results on hyperpigmentation with some users seeing no benefit
- Can exacerbate redness and irritation on sensitive or dry skin types
Product details
Skin type data limited
Where to buy
Real Reddit threads
5 threads from r/koreanskincare, r/AsianBeauty
“I have the Jumiso niacinamide and it’s not doing anything for my hyperpigmentation”
Positive
“the jumiso niacinamide 20% I just finished that one and I would say it is good, not heavy, didn't burn or sensitized my skin, it was okay!”
Positive
“but it did help fading some of the PIH i had!”
Positive
“Jumiso 20% niacinimide”
Mentioned
“What's something that really really works for skin like that?”
Mentioned
“Please give recs from personal experiences where you have seen results.”
Mentioned
“JUMISO - Niacinamide 20 Serum”
Mentioned
“I then went to YESSTYLE and their prices are significantly lower without tariffs so I ended getting myself the following because I want to try: ... JUMISO - Niacinamide 20 Serum”
Mentioned
“I started using retinol (Thome CPR) along with Jumiso Niacinamide 20, and Melano CC Vitamin C”
Cautionary
“Ok, so I have come to the conclusion that I damaged my skin barrier.”
Cautionary
“Well, the past 3 weeks or so my skin has been sensitive and inflamed followed with acne.”
Cautionary
“I've heard good things about these 2 products ( Arencia Vit C booster shot and Jumiso Niacinamide Serum )”
Mentioned
“But is it wise to start them both at the same time ?”
Mentioned
“My main goal is to reduce hyperpigmentation, acne spots”
Mentioned
Dupes & Alternatives
Anua
Azelaic Acid 10 Hyaluron Redness Soothing Serum
Better for Hyperpigmentation
4 shared traits
525 mentions
