Yuja Niacin 30 Days Miracle Brightening Toner — Reddit Reviews
by Some By Mi
Updated September 26, 2026
Niacinamide toner for brightening; eczema-prone users still report it works.
What the community says
A niacinamide toner people use for brightening and as an everyday routine step. Redditors with combination or eczema-prone skin have stuck with it for years, but one user flagged sensitivity or product clash.
What this means for you
What people love
Watch out for
Product details
Skin type data limited
Where to buy
What the science says
Acne
Some evidence
Niacinamide: 6 studies tested it on its own. See all 17 studies
What the studies found
- Most studies found niacinamide helped acne
- Some studies found 4% niacinamide cleared acne about as well as clindamycin
- One study found 4% niacinamide improved red, sore spots, but IPL worked better
- Some research found no clear difference, and a large review said the effects were uncertain
Hyperpigmentation
Some evidence
Niacinamide: 5 studies tested it on its own. See all 24 studies
What the studies found
- All of these studies found niacinamide helped fade dark spots or patches
- In clinical trials, 5% niacinamide faded dark spots more than a placebo
- It also helped when used with salicylic acid peels, more than peels alone
- Used on its own, it helped, but one study found a niacinamide mix worked better
- One study found the fading effect reversed after stopping niacinamide
Research context, not treatment advice. Studies are about the ingredient, not necessarily this exact product.
Real Reddit threads — 5 mentions across 4 threads
Some By Mi Yuja Niacin 30 Days Miracle Brightening Toner on Reddit, in one place — 4 threads from r/koreanskincare, r/AsianBeauty and 1 more, summarized.
“SomebyMi Yuja Niacin Toner (~4 years)”
Positive
“combination skin, eczema prone, have pcos 🙋🏻♀️”
Positive
“if it works well, I stick with it”
Positive
“Some By Mi Yuja Niacin Brightening toner”
Positive
“I find a combination of AHA and lots of hydration makes a massive difference.”
Positive
“Rn it's:”
Positive
“Some By Mi Yuja Niacin Toner”
Mentioned
“Here’s my current skincare routine right now: 2. Some By Mi Yuja Niacin Toner”
Mentioned
“Could it just a sensitivity thing, or possibly my products clashing?”
Mentioned
“I began using the 30-day miracle and the Yuja Niacin lines in March 2025 (Yuja Niacin in the morning and 30-Day at night).”
Positive
“So I've been using Some By Mi products for over a year until last month when for an unknown reason I decided to try something new lol.”
Positive
“Some By Mi completely cleared that out.”
Positive
