Jumiso Niacinamide 20 Serum Dupes & Cheaper Alternatives
From 33 Reddit threads · Updated October 17, 2026
20% niacinamide fades stubborn marks fast; irritation risk runs high. The catch: 20% strength stings sensitive skin. Here's what Redditors reach for instead.
The short answer
Best Overall AlternativeTranexamic acid plus niacinamide for dark spots · $17.00 · 29.9 ml
Best Cheaper AlternativeHigh-strength niacinamide serum with clinical acne evidence · $6.00 · 30 ml vs $16.80 for the original
Same Active: NiacinamideClinical acne evidence for niacinamide · $34.56 · 50 ml
#1
Best Overall Alternative
- Size: 29.9 ml
- Price per ml: $0.57/ml (original $0.42/ml)
The why
One minus
Breakouts, including cystic acne, hit some users
Good forSensitive Skin, Dry Skin
Both recommended for Hyperpigmentation.
“For one serum to cover a lot of these bases, the No.5+ Glutathione Vitamin Concentrated Serum might be a good option.”
— Reddit, r/koreanskincare
The original, at a glance
- Why people love it
- Quick PIH fading reported
- Price
- $16.80 · 40 ml · $0.42/ml
#2
Best Cheaper Alternative
- Key actives: Niacinamide 10%, Zinc 1%
- Size: 30 ml
- Price per ml: $0.20/ml (original $0.42/ml)
The why
A 10% niacinamide and zinc serum for oily, congestion-prone skin and visible pores. Redditors report impressive clarity and smaller-looking pores; studies found niacinamide can help acne, but this strength regularly triggers stinging, redness, and breakouts.
One minus
10% strength can sting, burn, or cause redness
Good forDry Skin
Both recommended for Hyperpigmentation.
#3
Same Active: Niacinamide
- Size: 50 ml
- Price per ml: $0.69/ml (original $0.42/ml)
The why
A niacinamide treatment serum aimed at glow, pores, and uneven texture. Redditors report smoother, brighter skin, while studies support niacinamide for acne but remain uncertain; reactive skin can face burning, redness, breakouts, and barrier damage.
One minus
Stinging and burning can be intense
Both recommended for Hyperpigmentation.
“it helped lighten and fade the severe melasma i had all over my face, and dramatically reduced the size of my pores, and even decades old pick scars i had on my cheeks started to improve!”
— Reddit, r/koreanskincare
#4
Best for Hyperpigmentation
- Key actives: L-ascorbic acid 15%, alpha tocopherol 1%
- Size: 30 ml
- Price per ml: $4.93/ml (original $0.42/ml)
The why
A 15% L-ascorbic acid serum with 1% tocopherol and 0.5% ferulic acid, built for morning brightening and antioxidant support. It suits experienced vitamin-C users chasing stubborn spots, but sensitive or breakout-prone skin may sting, redden, or react.
One minus
Eye-watering price for 30 mL; cheaper same-formula alternatives abound
Both recommended for Hyperpigmentation.
“The skinceuticals CE ferulic made my hyperpigmentation less visible and my skin overall brighter as well.”
— Reddit, r/scacjdiscussion
Other alternatives worth a look
10% niacinamide + 4% tranexamic acid brightening combo · 153 mentions
LightweightDark Spots
Lightweight, dewy glow under makeup · 106 mentions
Dry SkinSensitive Skin
10% tranexamic acid for post-acne pigmentation · 81 mentions
Under MakeupLightweight
Niacinamide-led texture and tone support · 66 mentions
Sensitive SkinDewy Finish
Centella, niacinamide, and tranexamic acid brightening blend · 61 mentions
Brightening
2% alpha-arbutin plus niacinamide and tranexamic acid · 30 mentions
Dry SkinSensitive Skin
10% OTC azelaic acid; studies support the active for acne · 750 mentions
Dry SkinSensitive Skin
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