Awakens skin
"This serum absorbs quickly into the skin, leaving a fresh feeling, but not tight. I had used previously and tried others but came back. Now I follow the setum with their night cream. Delightful!!"
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A lightweight, moisture-boosting serum that smooths wrinkles and fine lines while replenishing dry, depleted skin.
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Suitable for
All skin types.
Why we stand behind it
This fast-absorbing, anti-aging serum is clinically proven to smooth the appearance of all lines and deliver a lifted, firmer look. Two molecular weights of hyaluronic acid, seaweed, and snow mushroom, work together to restore and maintain optimal moisture levels, keeping your skin hydrated, plump, and dewy any time of day. Clinically and dermatologist tested.
Clinically Shown to*:
- Instantly increase hydration
- Minimize the look of lines & wrinkles in 2 weeks
- Visibly improve skin firmness & elasticity in 2 weeks
After 2 weeks*:
100% agreed skin felt softer and smoother
97% agreed skin felt more supple & elastic
93% agreed skin felt firmer & bouncy
After 4 weeks*:
97% agreed it minimized the look of lines & wrinkles
90% agreed expression & emerging lines appear less visible
*Based on a third-party clinical study conducted over 4 weeks on 30 women ages 43-64 (including; expert skin grading, instrumental measurements & consumer perception study).
Key ingredients
Japanese miru seaweed: Replenishes and balances the skin’s natural moisture level for healthy, hydrated skin.
2X hyaluronic acid: High and low molecular weights work synergistically to boost hydration, fullness and firmness of skin.
Volcanic marine ferment: This unique marine ferment effectively plumps and smooths fine lines.
Snow mushroom: Forms a hydration layer on skin to seal in moisture.
this product meets
The Credo Clean Standard™
Every product we offer meets our industry leading standards for safety and sustainability.
learn moreThis product is
Cruelty Free
Sustainable Packaging
Vegan
Gluten Free
Fragrance Free
Alcohol Free
Paraben Free
Non GMO
An undertone is the color beneath the surface of your skin, which never changes (even with a tan). There are three types of undertones:
Pink/Cool
I see red or pink undertones around the perimeter of my face and neck.
My skin burns easily, but barely tans.
My skin looks better in silver jewelry than gold.
Neutral
I see both pink and yellow undertones around the perimeter of my face and neck.
My skin sometimes burns and sometimes tans.
My skin looks good in both gold and silver jewelry.
Yellow/Warm
I see yellow or golden undertones around the perimeter of my face and neck.
My skin rarely burns, but tans easily.
My skin looks better in gold jewelry than silver.
Find your shade match
Take our 1 minute quiz and get matched to real people with your skin tone and type.
After cleansing, apply Hyaluronic Sea Serum over face.
Allow to absorb.
Seal in with OSEA moisturizer of your choice.
Use morning and night.
Pro-tip
For added hydration, mist face with Sea Minerals Mist before applying.
We co-founded the nonprofit Pact to demystify how to recycle your beauty packaging empties and divert waste from landfills.
How to recycle your empties
1. Disassemble and clean all components
2. Pick the right disposal bin
3. Drop off your empties at your nearest Pact bin
1 Product Recycled = 10 Credo Rewards Points
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Inspired by her grandmother’s lifelong love of the sea, Jenefer Palmer set out to share her passion through a plant-based skin care line infused with elements of the ocean. Distraught by the harmful chemicals she found in other products, Palmer resolved to craft her formulas with safer, nourishing ingredients.
While OSEA has now expanded into a world-renowned skin care line, their commitment has stayed the same—producing effective, wholesome products as pure as the ocean itself.
Overall rating: 4.647309 / 5 from 706 reviews.
This serum is highly regarded for its fast absorption, hydrating properties, and visible anti-aging results. Customers report significant improvements in skin hydration, smoothness, and a lifted, firmer look. While some have mixed feelings about the scent and dropper, the overall consensus is positive regarding its effectiveness and skin appearance.
Review topics: ["acne","breakouts","ingredients","scent","size","fragrance","spots","retinol","redness","wrinkles","results","dryness","pores","eyes","skin","cleanser","weight","improvement","glow","effect","quality","residue","hydration","mask","benefits","value","appearance","issues","looks","complexion"].
"This serum absorbs quickly into the skin, leaving a fresh feeling, but not tight. I had used previously and tried others but came back. Now I follow the setum with their night cream. Delightful!!"
— Elaine J. (5/5)
"New to OSEA and tried the sea serum. It really works! I am 68 years old and use this once a day after cleansing my face. My skin on my face looks firmer. No kidding! Skin is smoother looking. I highly recommend this product."
— Lucya (5/5)
"I purchased the 1 Oz. Bottle. It is a very small vial. How long should the 1oz bottle last if I use it morning and night? Right now, I am using just a very little bit in the dropper, as it does not seem to release very well out of the dropper. I would guess my usage to be less than pea size."
— Cheri (5/5)
"Omg I keep purchasing from trusted skincare brands and getting bad quality products. Osea how could you. Like others have said this serum will dry out your skin. It doesn't absorb into the skin, it sits on top of it. It will flake off through out the day and make it difficult to add make- up under eyes. I will say the bottle is cool. This was such an expensive purchase - do not buy this product. I'm going to have to place it only on specific areas in order to try and make use out of it. Ugh. At least I'm not allergic to it."
— Bee (2/5)
"This product has made my skin soft and restored like no other. I love it! By the way, I'm 74."
— Terrye B. (5/5)
"I usually think people are exaggerating when they say a skincare product smells awful, because Ive never encountered that. Ive thought scents were not great, but not offensive. Until now. I thought I would splurge on myself and try OSEA. I got 3 things from Ulta, one of them being the hyaluronic sea serum. Never in my life have I smelled something so foul from a skincare line. The other products smell pleasant. The serum smells like a dead animal. Not earthy, not like the sea, not like fish, but a dead animal. Disgusting. I wanted to gag when putting it on my face. $88 dollars to smell like a dead animal is absolutely beyond unacceptable. I would not recommend this"
— Samantha W. (1/5)
"Use it with my day cream every day without exception"
— Isabella J. (5/5)
"Face wash, toner and then this Sea Serum has just a nice feel. Love it."
— Kelly B. (5/5)
"Very hydrating. Works beautifully with the Osea advanced protection cream"
— Dawn C. (5/5)
"4. 5 stars because it definitely works just leaves a bit of a sticky residue"
— Michalyn (4/5)
We offer clean beauty vetted to the highest standard.
We want to know where ingredients come from and how they were made.
Clean beauty should include the just treatment of humans and animals.
We co-founded Pact to tackle beauty’s packaging waste problem.
This fast-absorbing, anti-aging serum is clinically proven to smooth the appearance of all lines and deliver a lifted, firmer look. Two molecular weights of hyaluronic acid, seaweed, and snow mushroom, work together to restore and maintain optimal moisture levels, keeping your skin hydrated, plump, and dewy any time of day. Clinically and dermatologist tested.
Clinically proven to*:
Immediately, after 1 use*:
100% showed an increase in hydration.
93% agreed skin looked brighter, more radiant, and refreshed.
After 2 weeks*:
100% agreed skin felt softer and smoother.
97% agreed skin felt more supple and elastic.
93% agreed skin felt firmer, plumper, and bouncy.
After 4 weeks*:
97% agreed it minimized the look of fine lines and wrinkles.
90% agreed expression & emerging lines appear less visible.
*Based on a third-party clinical and consumer study conducted over 4 weeks on 30 women ages 43-64 (including; expert skin grading, instrumental measurements, and consumer perception study).
OSEA 3 Limit Alcohol Free allproducts autoreplenishfavorites beauty counter beautycounter brandbestseller Buy X and Y climate neutral certified cruelty free excluded Fathers day for him Fragrance Free Gluten Free Jess FOC Recs leaping bunny Mother's Day Non GMO ocean positive certified Paraben Free PETA certified serums Set for summer Shop By Concern_Dry Skin Shop By Concern_Firming Shop By Concern_Sensitive Skin Shop By Ingredient_Alcohol Free Shop By Ingredient_Fragrance Free Shop By Ingredient_Gluten Free Shop By Ingredient_Vegan Shop by Packaging_Glass Shop by Routine_Morning & Night Shop By Skin Type_All Shop By Skin Type_Dry Shop By Skin Type_Sensitive skin care skin care spotlight SPG Sustainable Packaging synthetic fragrance free treatments Vegan women founded YCRF_skin care add-to-cart //credobeauty.com/cdn/shop/files/Osea_HyaluronicSeaSerum_02_Texture.jpg?v=1779397491 //credobeauty.com/cdn/shop/files/Osea_HyaluronicSeaSerum_03_Clinicals.jpg?v=1779397636 //credobeauty.com/cdn/shop/files/Osea_HyaluronicSeaSerum_04_Benefits.jpg?v=1779397656 //credobeauty.com/cdn/shop/files/Osea_HyaluronicSeaSerum_05_Ingredients.jpg?v=1779397536 //credobeauty.com/cdn/shop/files/Osea_HyaluronicSeaSerum_06_Model.jpg?v=1779397564 //credobeauty.com/cdn/shop/files/Osea_HyaluronicSeaSerum_07_Edu.jpg?v=1779397594 43473704396 1 oz / 30 ml 88.00 //credobeauty.com/cdn/shopifycloud/storefront/assets/no-image-2048-a2addb12.gif https://credobeauty.com/products/hyaluronic-sea-serum?variant=43473704396 InStock 1 oz / 30 ml