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Free US shipping on orders of $100 or more. 100% authentic Korean-market formulas. Ships from California or direct from Korea, tracked to your door. Intact Korean batch codes on every unit.

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KOREAN PHARMACY

Dr.Althea

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Aqua Marine Deep Serum

A hydrating serum from Dr. Althea's Korean-market lineup. Niacinamide sits at position 6 of 18 on the brand's own ingredient list, a brightening and barrier-support active; Panthenol follows at position 8, a barrier-support humectant that also settles visible irritation. 30ml to a unit.

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$16.99

30ml

$56.63 per 100 ml

  • Korean-market formula
  • Ships from California or direct from Korea
  • Korean barcode and batch code intact
Suited to
NormalCombinationDry
Helps with
A targeted treatment step between toner and moisturizerA concentrated step layered under a moisturizerDaily use as the treatment step of a routine

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  • 30-day returns
  • Free US shipping on orders of $100 or more
  • Tracked delivery to your door

How it works

The Aqua Marine Deep Serum is a 30ml serum, used after toner and before moisturizer, morning and evening. The active it is built around is Niacinamide, named fifth on its own ingredient list. The same list carries Adenosine, Raffinose and Panthenol, so the active is not the only thing on it worth naming. How much of the Niacinamide stays on the skin, and for how long, is decided by the serum format rather than by the list alone. This is the Original Korean Formula, the serum Dr.Althea sells in Korea, Niacinamide and all.

Key benefits

  • Niacinamide, the active this serum is built around
  • Adenosine on the same list, an active
  • Raffinose on the same list, a sugar
  • Panthenol and Sodium Hyaluronate on the same list, humectants
  • Niacinamide named fifth on the manufacturer list printed on this page
  • The Korean-market release of this serum, confirmed against its Korean barcode

Inside the formula

Inside the formula

17
Ingredients declared
No fragrance
on the list

1 of 4

Dr. Althea Aqua Marine Deep Serum

Dr.Althea Aqua Marine Deep Serum

How to use

  1. Use the Aqua Marine Deep Serum after your toner and before your moisturizer, morning and evening.
  2. Two or three drops for the whole face, pressed in with the flats of your fingers while skin is still damp.
  3. Follow with a moisturizer within a minute or two, because a thin serum left bare dries down and takes surface water with it.
  4. Twice a day, every day. Do not use it as your only layer on skin that already feels tight; a serum is not a seal.

Worth knowing

  • Patch test on the inner arm first, as with any new step added to a routine.
  • Discontinue if irritation develops and check the ingredient list against any known sensitivity.

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Dr. Althea Aqua Marine Deep Serum

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We’re on gram!

Creators trying on authentic Korean skincare routines and products from us.

  • Layering the Dr. Althea Aqua Marine serum under the cream.

    baejee · YouTube

  • Rating a shelf of Dr. Althea products one by one.

    Jasmine Loo · YouTube

  • Two hydrating serums side by side, IUNIK and Dr. Althea.

    Kristin · YouTube

  • A walk through the Dr. Althea serum lineup and who each one suits.

    auraofmahmuda · YouTube

  • A blunt first take on the Dr. Althea range.

    Lexi Chang · YouTube

  • A first look at the viral 345 Relief Cream before buying.

    Shelley Nayak · YouTube

  • A first try of the Dr. Althea serum on camera.

    Hannah Ziad · YouTube

Dr.Althea, Korean-market original

The Original Korean Formula serum from Dr.Althea, 30ml formulated with Niacinamide and Adenosine, shipped from California or direct from Korea.

Verify your unit when it arrives

Verify your unit when it arrives

Korean-market stock with the original barcode and batch code intact, exactly as it left Korea.

On the unit itself

  • The Korean-market barcode, unaltered from the retail package.
  • The manufacturer’s batch code, exactly as the maker printed it.

정품Genuine article, Korean-market stock

What professionals say

What professionals say

What skin-care professionals say about skin care, quoted from the medical sources linked beside each.

  • Your skin barrier is basically your outer layer of the skin.

    Melissa Piliang, MDDermatologist, Cleveland Clinic
  • Pretty much every step of a Korean skin care routine is going to have some component of hydration.

    Alok Vij, MDDermatologist, Cleveland Clinic

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