Good Hyaluronic Serum
"I appreciate that this serum absorbs easily and is hydrating. It doesn’t do anything else (no help with tightening skin nor diminishing fine lines and acne scars), but if all you need is hydration, this is great!"
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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
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: 4.650619 / 5 from 727 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: ["size","weight","results","issues","quality","feels","improvement","scent","skin","packaging","texture","price","looks","absorbs","hydration","serum","bottle","ingredients","face","difference","glow","oil","amount","drops","breakouts","formula","consistency","osea","wrinkles","redness"].
"I appreciate that this serum absorbs easily and is hydrating. It doesn’t do anything else (no help with tightening skin nor diminishing fine lines and acne scars), but if all you need is hydration, this is great!"
— Rachael E. (4/5)
"I use this in the PM and it leaves my face feeling so hydrated and rejuvenated the next AM."
— Amanda R. (5/5)
"Very goood"
— Isa (5/5)
"Works great!! I have used this product for over a year and I absolutely love it. I have noticed that my wrinkles around my mouth and eyes are getting harder to see. Its like a face lift in a bottle!! I have recommended this product to my friends! Thank you! Finally something I like and something that works for me! I don even wear foundation anymore!"
— Cindy K. (5/5)
"I absolutely LOVE this product. Living by the beach and surfing 3-4x per week, this is a lifeline. It's the best product for my skin and climate. It's lightweight, hydrating, smells great. It restores hydration after being in the ocean for several hours at a time. Also great whether it's dry or hot, basically the 2 rotating climates where I live. My skin barrier is much improved after using this regularly and I actually don't need a heavy cream or moisturizer anymore because my skin is so plump and dewy. I will be buying this product for life!"
— Krista G. (5/5)
"Very hydrating. Love! Helps with fine lines and wrinkles."
— NICOLE R. (5/5)
"I have used the serum virtually every day for more than 5 years and just can live without it. I always have a back up bottle in my closet so Im never without it. My skin is extremely dry and sensitive. This ensures that my skin stays hydrated with absolutely no irritation. My no 1 must have!!!"
— Sue T. (5/5)
"The first time I tried the Sea Serum was with my subscription of the Body Oil and a sample of the serum was included. I love how my face feels when I use twice a daily under my moisturizer. My skin absorbs it and it never feels sticky. Since Im very hesitant to try new products, I find that samples in subscription orders are a great way to try first. Thank you!"
— Sheila A. (5/5)
"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)
"I was hesitant because of the price. I use it daily and will reorder"
— Jennie S. (5/5)
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 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