Shopping Bag
100% Money Back Guarantee

You can’t be sure of much in life, but after 24 years of incredible results we’re sure of this: OSEA works.

Try our products risk-free with our 100% Money-Back Guarantee.

Free Shipping on Orders $75+
In Stock and Shipping All Orders

Hyaluronic Sea Serum

Hyaluronic Sea Serum

Hyaluronic Sea Serum

180 reviews
Moisture Magnet
Burst of hydration for all skin types. High performance concentrate visibly improves signs of aging.Increases facial volume and encourages brighter, firmer skin. Formulated with three organic seaweeds and multiple molecular weights of Hyaluronic Acid. Fragrance free.
Size: 1 oz | All Skin Types

How to Use

After cleansing, apply this plumping serum onto skin to deliver an instant antioxidant boost. Allow to absorb. Seal in with OSEA moisturizer of choice. Use morning + night. 

Pro Tip

For additional hydration, layer with Sea Mineral Mist and follow with OSEA moisturizer.

Benefits


  • Lightweight

  • Age Defying

  • Reduces Redness

  • Absorbs Quickly

  • Oil Free

Key Ingredients

  • Gigartina Skottsbergii a red algae that deeply hydrates skin and promotes the appearance of youthful volume and firmness. Helps protect skin from external aggressors such as wind, dry climates and air pollution. Rich in polysaccharides, vitamins and minerals.
  • Undaria Pinnatifida a brown marine algae rich in iodine, iron, potassium, calcium and vitamins B1, B2, B3, B6 and B12. Composed of molecules known as Fucoidan, which play a unique role in maintaining skin. Reduces appearance of fine lines and wrinkles while minimizing appearance of surface redness.
  • Macrocystis Pyrifera A bioactive brown algae abundant in Fucoidan, vitamins, minerals, antioxidants and essential fatty acids. Purifies pores and visibly diminishes uneven skin texture. Plumps skin with anti-aging benefits and reduces redness.
  • Hyaluronic Acid A plant-derived polysaccharide found naturally in skin that holds water. This hydrophilic (water-loving) molecule delivers moisture without clogging pores. Instantly plumps fine lines and makes skin glow. Ideal for all skin types.
  • Sodium Hyaluronate A vegan ferment of Hyaluronic Acid. This water soluble salt is a smaller molecular size than Hyaluronic Acid. Helps restore skin’s moisture barrier.
Read full ingredient list

NATURAL DERIVED INGREDIENTS

Aqua, Gigartina Skottsbergii Extract*, Macrocystis Pyrifera Extract*, Undaria Pinnatifida Extract*, Sodium Hyaluronate, Hyaluronic Acid, Potassium Sorbate, Citric Acid, Lonicera Caprifolium Extract, Lonicera Japonica Extract, Chlorophyll

*ORGANIC INGREDIENT

After cleansing, apply this plumping serum onto skin to deliver an instant antioxidant boost. Allow to absorb. Seal in with OSEA moisturizer of choice. Use morning + night. 

Pro Tip

For additional hydration, layer with Sea Mineral Mist and follow with OSEA moisturizer.


  • Lightweight

  • Age Defying

  • Reduces Redness

  • Absorbs Quickly

  • Oil Free
  • Gigartina Skottsbergii a red algae that deeply hydrates skin and promotes the appearance of youthful volume and firmness. Helps protect skin from external aggressors such as wind, dry climates and air pollution. Rich in polysaccharides, vitamins and minerals.
  • Undaria Pinnatifida a brown marine algae rich in iodine, iron, potassium, calcium and vitamins B1, B2, B3, B6 and B12. Composed of molecules known as Fucoidan, which play a unique role in maintaining skin. Reduces appearance of fine lines and wrinkles while minimizing appearance of surface redness.
  • Macrocystis Pyrifera A bioactive brown algae abundant in Fucoidan, vitamins, minerals, antioxidants and essential fatty acids. Purifies pores and visibly diminishes uneven skin texture. Plumps skin with anti-aging benefits and reduces redness.
  • Hyaluronic Acid A plant-derived polysaccharide found naturally in skin that holds water. This hydrophilic (water-loving) molecule delivers moisture without clogging pores. Instantly plumps fine lines and makes skin glow. Ideal for all skin types.
  • Sodium Hyaluronate A vegan ferment of Hyaluronic Acid. This water soluble salt is a smaller molecular size than Hyaluronic Acid. Helps restore skin’s moisture barrier.
Read full ingredient list

NATURAL DERIVED INGREDIENTS

Aqua, Gigartina Skottsbergii Extract*, Macrocystis Pyrifera Extract*, Undaria Pinnatifida Extract*, Sodium Hyaluronate, Hyaluronic Acid, Potassium Sorbate, Citric Acid, Lonicera Caprifolium Extract, Lonicera Japonica Extract, Chlorophyll

*ORGANIC INGREDIENT

Consciously Crafted

VEgan & Cruelty Free

CALIFORNIA MADE

ORGANIC ALGAE

30 day Guarantee

Reviews

Customer Reviews
4.6 Based on 180 Reviews
Write a Review Ask a Question
  • Reviews
  • Questions

Thank you for submitting a review!

Your input is very much appreciated. Share it with your friends so they can enjoy it too!

Filter Reviews:
D
05/19/2020
DIane
United States United States
  • How old are you? 60
  • What best describes your skin? Mature & Dry
Hyaluronic sea serum

I will purchase this serum again. It is easily applied over damp skin. It has a lovely light fragrance, and absorbs well. I do feel my complexion is brighter after using it, and think there will be continued improvement the longer I use it.

D
05/17/2020
Danielle
United States United States
  • How old are you? 35-44
  • What best describes your skin? Sensitive & Reactive
Nice plumping benefit but stings my eyes

I don't usually invest in serums because I use a prescription retinol, but when this one went on sale I decided to give it a try since I'm always seeing beauty editors swear by hyaluronic acid. Of course as soon as I ordered it a big story come out about how it can actually be drying and irritating. I decided to see for myself and starting using the serum every night for the past couple of months. My skin is plump and hydrated when I wake up, but I haven't noticed any major changes. The problem for me is that my eyes sting like crazy and tear if I get the product within an inch of them, to the point where I can't even keep my eye cream on. My eyes are very sensitive so this isn't terribly surprising, but it's enough to keep me from purchasing again.

A
05/16/2020
Allison
United States United States
  • How old are you? 45-60
  • What best describes your skin? Mature & Dry
Love Osea!

I love Osea products! I am 46 and have struggled with skincare my whole life because I have super sensitive and dry skin. Osea products are soothing, don't irritate my skin and truly moisturize my skin. Also, the smell is subtitle and lovely. You have a super fan in me!

AH
05/07/2020
Andrea H.
United States United States
  • How old are you? 60+
  • What best describes your skin? Mature & Dry
Love this!

I love this serum. My skin looks and feels great when i use this. Even at 60 it make my skin look dewy!

TM
04/30/2020
Tammy M.
Canada Canada
  • How old are you? 45-60
  • What best describes your skin? Sensitive & Reactive
I like it

I like the product. Not sure if I have noticed a big difference in my skin but it hasn't become worse. I have rosacea so I was worried the ingredients may aggravate my skin but it didn't so that was a plus. What has been disappointing is that the plunger doesn't work so getting the serum out of the container has been very challenging.

I
04/28/2020
Ione .
United States United States
  • How old are you? 25-34
  • What best describes your skin? Normal & Combination
Still on the search for the perfect routine

This product was recommended to me after a facial at the Osea skincare studio. I wanted to build my perfect Osea skincare lineup for home, so I started with this and a moisturizer, making sure to follow the kind shop associate's application instructions. Overall, after about 10 weeks of twice daily use, I'd say I like the product, but I'm going to continue to try different products. I like the serum, and I may come back to it!