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Aqua Marine Deep Serum

Serum

Aqua Marine Deep Serum — Reddit Reviews

by Dr. Althea

Not enough verdicts yetSee the Reddit discussion

Updated October 10, 2026

Watery niacinamide serum for dehydrated barrier support; layers easily.

What the community says

Backed by 53 studies

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.

From Reddit

Backed by 2 threads from r/tretinoin and r/Rosacea.

Read the threads ↓

What people love

  • Watery texture that layers fast
  • Niacinamide plus panthenol and glycerin
  • Keeps dehydrated, tretinoin-dry skin calmer

Watch out for

  • The exact product callout is messy in threads
  • Not much feedback beyond hydration chatter
  • Hard to tell how it behaves on breakout-prone skin

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

    What the studies found
    • Most studies found niacinamide helped acne
    • It often cleared acne about as well as clindamycin when put on the skin
    • Some studies found it helped reduce red, sore spots and pimples
    • Some evidence is still uncertain because some studies found no clear difference
  • Hyperpigmentation

    Some evidence

    Niacinamide: 5 studies tested it on its own. See all 20 studies

    What the studies found
    • All 5 studies that tested it on its own found it helped fade dark spots
    • On its own, it reduced facial darkening and made skin look lighter than a placebo
    • It also improved dark spots linked with sun damage in one clinical trial
  • 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

    What the studies found
    • The one study that tested it on its own found it helped the skin barrier
    • It lowered water loss through the skin
    • It increased the thickness of the outer skin layer

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

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