OSEA Hyaluronic Sea Serum

OSEA Hyaluronic Sea Serum
3.2
/ 10
Moisturizing
6.5 Humectancy icon Humectancy
0.0 Occlusivity icon Occlusivity
Rich
in Antioxidants

Review

Does OSEA Hyaluronic Sea Serum work?

Based on the ingredient list analysis by CreamScan AI, these are the key benefits you can expect from using OSEA Hyaluronic Sea Serum:

  • Light moisturizing. It has a moisturizing rating of 3.2 out of 10.
  • Antioxidant protection.

Lightweight moisturizer well-suited for oily skin and a humectant enhancement for any skincare routine

According to CreamScan analysis, OSEA Hyaluronic Sea Serum is lightly moisturizing, with a moisturizing rating of 3.2 out of 10.

Is it more humectant or occlusive? Purely humectant. It has zero occlusivity (we didn't find any occlusive ingredients on the ingredient list) and a high humectancy of 6.5 out of 10, primarily due to the high content of Undaria Pinnatifida Extract (est. ≈3.0%) and Sodium Hyaluronate (est. ≈2.0%).

This humectant-rich product, when used alone as a moisturizer, is well-suited for oily skin, providing moderate hydration in a lightweight, fast-absorbing formula without any occlusive ingredients.

Tip: Certain studies suggest that humectants alone may not effectively moisturize the skin. If you use this product as your only moisturizer, we recommend following it with one that contains at least some occlusive ingredients.

But it’s not limited to oily skin - such a humectant enhancement will also positively contribute to the moisturizing efficacy of any skincare routine when used as a step before applying the main moisturizer. This type of formulation is typically used in serums, where a light, fast-absorbing texture is key.

Please refer to the Ratings section below for details of the moisturizing rating calculation.

Rich in skin-protecting antioxidants

We estimate that OSEA Hyaluronic Sea Serum is rich (> 3%) in antioxidants, specifically Macrocystis Pyrifera (Kelp) Extract (est. ≈4.0%) and Sodium Hyaluronate (est. ≈2.0%).

A key benefit of antioxidants is their ability to reduce oxidative stress caused by free radicals and therefore prevent accelerated skin aging. Studies also show that antioxidants can protect against environmental damage such as UV radiation and pollution, and help reduce inflammation and skin redness.

Ingredients

Est. % Ingredient Origin Functions
80
6
4
3
2
1.5
0.3
0.3
0.3
0.3
0.3
Est. %
Water
Function:
Origin:
Gigartina Skottsbergii Extract
Function:
Origin:
Macrocystis Pyrifera (Kelp) Extract
Function:
Origin:
Undaria Pinnatifida Extract
Function:
Origin:
Sodium Hyaluronate
Function:
Origin:
Hyaluronic Acid
Function:
Origin:
Potassium Sorbate
Function:
Origin:
Citric Acid
Function:
Origin:
Lonicera Caprifolium (Honeysuckle) Extract
Function:
Origin:
Lonicera Japonica (Honeysuckle) Leaf Extract
Function:
Origin:
Copper Chlorophyll
Function:
Origin:

Ratings

All humectants
6.5
3
2
1.5
Benchmark
10
All occlusives
0.0
None
Benchmark
20
Moisturizing rating
3.2
Ingredient Est. % Benchmark Raiting
Humectancy All humectants 6.5 10
6.5
3
2
1.5
Occlusivity All occlusives 0.0 20
0.0
None
Moisturizing rating
3.2
Ingredient Est. % Benchmark Humectancy
3
2
1.5
All humectants 6.5 10
6.5
All humectants
6.5
3
2
1.5
Benchmark
10
Ingredient Est. % Benchmark Occlusivity
None
All occlusives 0.0 20
0.0
All occlusives
0.0
None
Benchmark
20
Ingredient
Ingredient anti-wrinkle power
when present at, %
in this formula est. %
Rating
None
Total
0
None
Anti-wrinkle rating
0
Ingredient Est. % Benchmark
Rich in Antioxidants
4
2
1.5
All antioxidants 7.5 3 Rich in antioxidants
All antioxidants
7.5
Macrocystis Pyrifera (Kelp) Extract
4
Sodium Hyaluronate
2
Hyaluronic Acid
1.5
Benchmark
3
Ingredient Est. % Benchmark
Rich in Soothing
None
All soothing 0 5 No
All soothing
0
None
Benchmark
5

Ingredients explained

Water
Est. %80
Function
Origin
WaterThe most used ingredient in skincare. Its concentration defines the product texture: rich creams may have about 50% of water while a light jelly about 90%. Water doesn’t moisturize the skin by itself and is used in skincare as a solvent for other ingredients.
Gigartina Skottsbergii Extract
Est. %6
Function
Origin
Gigartina Skottsbergii Extract
Macrocystis Pyrifera (Kelp) Extract
Est. %4
Function
Origin
Macrocystis Pyrifera (Kelp) ExtractAn extract obtained from Giant kelp that is rich in gel-forming and thickening polysaccharides.
Undaria Pinnatifida Extract
Est. %3
Function
Origin
Undaria Pinnatifida ExtractAn extract of Wakame, an edible seaweed from Asian countries. It contains a moisturizing and thickening agal polysaccharide called fucoidan.
Sodium Hyaluronate
Est. %2
Function
Origin
Sodium Hyaluronate

A sodium salt of famous hyaluronic acid. A potent humectant that hydrates the skin, supports collagen function, and fills out small wrinkles. Sodium hyaluronate also offers soothing and antioxidant properties.

Hyaluronic Acid
Est. %1.5
Function
Origin
Hyaluronic Acid

A potent, skin-identical humectant moisturizing ingredient that is able to bind water 1000 times its own weight. The anti-aging benefits of hyaluronic acid are due to its ability to stimulate the synthesis of collagen in the skin.

Potassium Sorbate
Est. %0.3
Function
Origin
Potassium SorbateA preservative widely used in food and personal care products, available from natural sources or synthetically produced. Potassium sorbate works by inhibiting the growth of yeasts, molds, and some bacteria.
Citric Acid
Est. %0.3
Function
Origin
Citric AcidA gently exfoliating AHA that helps to remove the top layer of dead skin cells. In comparison to other AHAs, citric acid has been shown to be one of the least effective. It is also very commonly used as a stabilizing and pH-controlling agent.
Lonicera Caprifolium (Honeysuckle) Extract
Est. %0.3
Function
Origin
Lonicera Caprifolium (Honeysuckle) Extract
Lonicera Japonica (Honeysuckle) Leaf Extract
Est. %0.3
Function
Origin
Lonicera Japonica (Honeysuckle) Leaf Extract
Copper Chlorophyll
Est. %0.3
Function
Origin
Copper Chlorophyll