Deep Water Surge Hydrating Serum 30 — Reddit Reviews
by Arencia
Updated September 25, 2026
Niacinamide-serum HG for fast hydration and a plumper morning face; lightweight.
What the community says
Redditors keep calling this a hydrating serum, especially for night use and under makeup. It gets love for giving skin that plump, glassy look. A few people say it does basically nothing, so YMMV.
What this means for you
What people love
- Fast hydration, plump finish
- Lightweight under makeup
- Niacinamide plus humectants and ceramides
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
Arencia Deep Water Surge Hydrating Serum 30 on Reddit, in one place — 4 threads from r/koreanskincare and r/AsianBeauty, summarized.
“Arencia Deep Water Surge Serum”
Positive
“Arencia Deep Water Surge Serum (another recent HG which hydrates my skin really well.)”
Positive
“I freaking LOVE Arencia ... but the Deep Water Surge did nothing for me.”
Positive
“Arencia Deep Water Surge Serum (latest HG)”
Positive
“For me, the product I got results right away is the Arencia serum that is my hydrating serum at night. My skin was plump the next day.”
Positive
“Thanks! I got ... Arencia Deep Water Surge Serum (serums)”
Positive
“Arencia Deep Water Serge Serum”
Positive
“Another serum jelly that is also pretty great keeping my face hydrated and glassy.”
Positive
“I like it before makeup because it’s lightweight.”
Positive
“arencia deep water surge serum”
Positive
“- arencia deep water surge serum”
Positive
“the above is what I would try for a few days”
Positive
