Ultimate Nourishing Rice Overnight Spa Mask — Reddit Reviews
by COSRX
Updated September 25, 2026
Niacinamide-rich overnight mask that hydrates, brightens, and seals in moisture.
What the community says
A niacinamide-and-rice sleeping mask that people reach for when skin is dehydrated, dull, or needs an overnight seal. Redditors like it after retinoids and in fall or winter, but some find it heavy, greasy, or breakout-prone.
What this means for you
What people love
Watch out for
- Can feel greasy or heavy if you overapply
- Breakouts and flare-ups are a real complaint
- Not a great match for oily or redness-prone skin
Product details
Skin Type
Product Traits
Key Ingredients
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 — 39 mentions across 28 threads
COSRX Ultimate Nourishing Rice Overnight Spa Mask on Reddit, in one place — 28 threads from r/AsianBeauty, r/koreanskincare and 3 more, summarized.
“along side 2 Cosrx sleeping masks that I don’t love as much”
Mentioned
“2 Cosrx sleeping masks that I don’t love as much”
Mentioned
“Cosrx sleeping masks”
Mentioned
“Now when I need a little extra moisture I use the ultimate nourishing overnight rice mask from Cosrx.”
Positive
“focused on moisture/hydration instead until healed”
Positive
“when I need a little extra moisture”
Positive
“Cosrx ultimate nourishing rice overnight spa mask”
Positive
“plus either the Purito 5 ceramide moisturizer or Cosrx ultimate nourishing rice overnight spa mask.”
Positive
“Night time I use ...”
Positive
“moisturisers my skin love include the cosrx ultimate nourishing rice overnight spa mask”
Mentioned
“for context, moisturisers my skin love include the cosrx ultimate nourishing rice overnight spa mask and the illyoon ato cream!”
Mentioned
“Cosrx rice overnight mask i just cannot replace it. Its so good.”
Positive
“Cosrx has a moisturizer/ overnight mask with rice in it, may be a bit cheaper.”
Mentioned
“Cosrx has a moisturizer/ overnight mask with rice in it”
Mentioned
“may be a bit cheaper”
Mentioned
