Deep Water Surge Hydrating Serum 30 — Reddit Reviews
by Arencia
Updated October 6, 2026
Niacinamide-packed hydration serum; plumps fast and wears easily under makeup.
What the community says
A lightweight hydrating serum with niacinamide, glycerin, panthenol, sodium hyaluronate, ceramide NP, and squalane. Redditors use it for night routines and before makeup when they want quick plumpness and a glassy finish; a few say it does nothing.
What this means for you
What people love
- Fast hydration with a glassy finish
- Lightweight enough under makeup
- Loaded with niacinamide plus barrier helpers
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
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
- Niacinamide 5% faded dark spots more than a placebo in studies of sun-damaged skin and dark patches
- Used with salicylic acid peels, niacinamide improved dark patches more than peels alone
- A niacinamide mix faded dark spots better than niacinamide alone in one study
- One study found the fading effect reversed after niacinamide was stopped
Skin Barrier
Not proven yet
Few or mixed studies. This claim isn't established.
Niacinamide: 1 study tested it on its own. See all 17 studies
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.”
Positive
“My skin was plump the next day.”
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
