
Aqua Marine Deep Serum — Reddit Reviews
by Dr. Althea
Updated October 10, 2026
Watery niacinamide serum for dehydrated barrier support; layers easily.
What the community says
A watery niacinamide serum that people slot into simple hydrating routines, especially on tretinoin or when skin feels dry and thirsty. Redditors say it layers cleanly after toner or before cream, though the ID is a bit fuzzy in threads.
What this means for you
What people love
- Watery texture that layers fast
- Niacinamide plus panthenol and glycerin
- Keeps dehydrated, tretinoin-dry skin calmer
Watch out for
Product details
BrandDr. Althea
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
Hyperpigmentation
Some evidence
Niacinamide: 5 studies tested it on its own. See all 20 studies
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 — 7 mentions across 2 threads
Dr. Althea Aqua Marine Deep Serum on Reddit, in one place — 2 threads from r/tretinoin and r/Rosacea, summarized.
“Then i go in with dr althea aqua marine deep serum”
Positive
“In the morning it’s just toner, serum, moisturizer and sunscreen.”
Positive
“most of the products didn’t show results till months later I’m on my 5th refill.”
Positive
“and Dr. cream. Althea Aqua”
Positive
“Dr. Althea Aqua”
Positive





