Super Pure Niacinamide + Zinc Serum — Reddit Reviews
by Glossier
Updated September 26, 2026
5% niacinamide plus zinc serum people repurchase for steady skin; breaks some out.
What the community says
A 5% niacinamide serum with zinc that people use as a daily AM step or under moisturizer. Redditors call it a long-term repurchase, but some say it wrecked their skin and they paused it.
What this means for you
Backed by 6 threads from r/SkincareAddiction, r/SkincareAddictionUK and 1 more.
Read the threads ↓What people love
- 5% niacinamide with zinc
- Repeat-buy serum people stick with for years
- Layers fine under cream on wet skin
Watch out for
Product details
Key Ingredients
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
Both ingredients for acne
Niacinamide Some evidence
- 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
Studied at 4–10%this product: 5%
Zinc Not proven yet
Few or mixed studies. This claim isn't established.
4 studies tested it on its own. See all 16 studies
- The results were split, so there is no clear answer yet
- Some studies found zinc helped acne when put on the skin
- Used with clindamycin, zinc worked about as well as clindamycin alone
- Used with erythromycin, zinc did not clear acne better than erythromycin alone
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
Studied at 2–10%this product: 5%
Research context, not treatment advice. Studies are about the ingredient, not necessarily this exact product.
Real Reddit threads — 6 mentions across 6 threads
Glossier Super Pure Niacinamide + Zinc Serum on Reddit, in one place — 6 threads from r/SkincareAddiction, r/SkincareAddictionUK and 1 more, summarized.
“serum: glossier super pure (niacinamide and zinc - been repurchasing this for over 6 years now)”
Positive
“super pure was one of the first things that i found helped my skin.”
Positive
“super pure didn’t clear my skin over night, but nowadays when I go 3+ days without it I will break out”
Positive
“Another choice would be glossier super pure with 5% niacinamide”
Mentioned
“should I also look for a 'super pure 5% niacinamide'? as well”
Mentioned
“AM products: Glossier super pure (niacinamide+ zinc) serum”
Positive
“citric acid and niacinamide are both in the glossier serum I use”
Positive
“My current routine: AM products: Glossier super pure (niacinamide+ zinc) serum”
Positive
“I occasionally also use Glossier Super Pure Niacinamide & Zinc”
Cautionary
“especially the glossier, that thing wrecked me many years ago”
Cautionary
“I've been suspicious of the Glossier, that's good to know. I'll put that on pause for a bit.”
Cautionary
“or a niacinamide serum like this one https://www.glossier.com/products/super-pure”
Positive
“(5% or less) underneath on wet skin”
Positive
“and come on top immediately with the cream”
Positive
“CosRx Snail Mucin or Glossier Super Pure Niacinamide/Zinc”
Positive
“PM:”
Positive
“Current routine:”
Positive
