Niacinamide 20 Serum — Reddit Reviews

Name: Niacinamide 20 Serum
Brand: Jumiso
Rating: 76 (13 reviews)

by Jumiso

76nextscore13 verdicts

Updated September 5, 2026

20% niacinamide serum fades hyperpigmentation fast but often causes irritation.

$16.80at Stylevana

See 29 dupes

What the community says

A high-strength 20% niacinamide serum widely used for hyperpigmentation and PIH. It suits those with a resilient skin barrier but often stings sensitive skin or worsens irritation. Many users recommend buffering it to reduce side effects and improve tolerance.

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From Reddit

Backed by 19 threads from r/koreanskincare, r/AsianBeauty and 2 more.

Read the threads ↓

What people love

High 20% niacinamide concentration targets pigmentation and PIH quickly
Lightweight, non-heavy texture that layers well in routines
Popular in Korean skincare circles for visible mark-fading results

Watch out for

Commonly causes stinging and irritation, especially on sensitive skin
Too strong for many; recommended to patch test or dilute before use
Can worsen redness or cause flushing, possibly darkening skin temporarily

Product details

BrandJumiso

K-Beauty

Use caution

Sensitive Skin

Concerns

Hyperpigmentation

Key Ingredients

Niacinamide

Where to buy

Real Reddit threads — 26 mentions across 19 threads

Jumiso Niacinamide 20 Serum on Reddit, in one place — 19 threads from r/koreanskincare, r/AsianBeauty and 2 more, summarized.

r/koreanskincareTalk me OUT of buying these products or convince me they're worth it

Hyperpigmentation Niacinamide Lightweight Sensitive Skin K-Beauty

“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

“it did help fading some of the PIH i had!”
Positive

r/koreanskincareWhat's something that works on stubborn pigmentation. Need miracle workers!

Niacinamide K-Beauty

“Jumiso 20% niacinimide”
Mentioned

“What's something that works on stubborn pigmentation.”
Mentioned

“Need miracle workers!”
Mentioned

r/koreanskincareOY vs Yesstyle - Products Pricing

Niacinamide K-Beauty

“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:”
Mentioned

“if I end up liking it, I’ll just re-purchase.”
Mentioned

r/koreanskincareI need help on my routine

K-Beauty

“and the Jumiso Niacinamide 20% + the Isdin Sunscreen”
Mentioned

“I would like advice on these new products im thinking about buying”
Mentioned

“I will take any recommendations or comments”
Mentioned

r/koreanskincareDr.G RED Blemish - WOW

Niacinamide Skin Barrier Sensitive Skin Redness/Irritation Acne K-Beauty

“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

r/koreanskincareThoughts on the JUMISO Niacinamide 20% Face Serum?

Niacinamide Sensitive Skin Redness/Irritation Skin Barrier K-Beauty

“Thoughts on the JUMISO Niacinamide 20% Face Serum?”
Cautionary

“I would not use this product.”
Cautionary

“This one felt a bit stinging on me (sensitive skin) but it worked oh my god did it work! I saw fainter PIH overnight but it was too strong to keep going.”
Cautionary