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  • A bottle of OSEA hyaluronic sea serum with a white label and green cap.
  • Model applying OSEA Hyaluronic Sea Serum dropper to face outdoors in natural light
  • Clinical results graphic showing 97% improvement in smoothness and 100%  in skin hydration
  • Mature model with glowing skin after using OSEA Hyaluronic Sea Serum
  • Swatch of Hyaluronic Sea Serum with visible suspended micro-droplets on light surface
  • OSEA Hyaluronic Sea Serum bottle and dropper separated on clean white background

Hyaluronic Sea Serum

High-performance, hydrating serum with hyaluronic acid and seaweed is clinically shown to improve elasticity and visibly reduce lines & wrinkles while boosting hydration.
Size
1 fl oz
Purchase options
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More info

Benefits

How to use

Recycling

Product Video

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Results You Can Sea®

After One Use*:

  • 100% showed improvement in fine lines and wrinkles
  • 97% showed improvement in skin hydration
  • Improves skin elasticity

After 1 week*:

  • 100% showed improvement in fine lines and wrinkles
  • 90% showed improvement in skin hydration
  • Improves skin elasticity
  • Improves skin's moisture barrier
  • *Based on an independent, third-party clinical study conducted on 31 women.

Formulated With

Replenishes and balances the skin’s natural moisture level for healthy-looking, hydrated skin.

High and low molecular weights work synergistically to boost hydration and deliver multi-level moisturization.

Natural hyaluronic acid that forms a hydration layer on skin to seal in moisture.

Plant based amino acid helps hydrate and maintain optimal water balance.

This unique marine ferment effectively smooths the look of fine lines.

FAQs

After cleansing with your favorite cleanser, like our bestselling Ocean Cleanser, follow with Sea Minerals Mist to prep skin and then apply a few drops of Hyaluronic Sea Serum to slightly damp face and neck. Allow to absorb. Seal in with your moisturizer of choice, like Seabiotic® Water Cream during the day and Dream Night Cream at night.

Our skincare products are made with naturally derived ingredients to provide the best benefits for your skin. Hyaluronic Sea Serum is fragrance free meaning there is no fragrance or essential oils added. However, you may detect a scent from some of the naturally derived ingredients in this formula.

Olfactory receptors (or sense of smell) differ from person to person so it is hard to describe what you might smell in a fragrance-free formula, but it could best be described as a bit “earthy” or “medicinal”. Please note the scent does not affect the product’s quality or efficacy.

Hyaluronic Sea Serum is our high-performance hydrating serum.
This fast-absorbing, hydrating serum is clinically shown to improve skin elasticity and visibly reduce fine lines & wrinkles. Two molecular weights of hyaluronic acid, seaweed and snow mushroom work together to help maintain optimal moisture levels. A burst of hydration for all skin types.

Dream Night Serum is our wrinkle smoothing serum.
This powerful formula works while you sleep to visibly reduce crow’s feet, fine lines, and even deeper wrinkles as you age. Algae-derived bio-retinol and two firming peptides combine to mimic the effects of retinol without irritation. Wake up to visibly smoother, firmer skin.

Seaglow Overnight Serum AHA Treatment is our exfoliating serum.
High-performance 9% AHA + 2% Phytic Acid treatment exfoliates to promote skin turnover, which evens tone and texture overnight. Nutrient-rich seaweed and Shiunko oil reinforce skin’s moisture barrier to reveal radiance. Wake up to clearer pores and a smoother, brighter complexion.

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Customer Reviews

4.6
Rated 4.6 out of 5 stars
Based on 865 reviews
Total 5 star reviews: 690 Total 4 star reviews: 73 Total 3 star reviews: 42 Total 2 star reviews: 28 Total 1 star reviews: 32
88%would recommend this product
Slide 1 selected
865 reviews
  • KK
    Katie K.
    Verified Buyer
    I recommend this product
    What best describes your skin? Sensitive & Reactive
    How old are you? 35-44
    Rated 5 out of 5 stars
    Yesterday
    Miracle in a Bottle

    I regret to inform you that this serum is absolutely worth every penny. I truly cannot believe the miracles this works on my skin. You know how we all dream of a product that just magically makes us look our very best with minimal effort? Well, this is that product. I love the texture and saw results instantly, but it's not one of those serums that starts out great then all of a sudden leaves you with dry skin or breakouts...it keeps getting better the longer you use it, and it layers so wonderfully under moisturizers and makeup. This is a must-buy for me now, and I'm so incredibly grateful I found this! For context, I'm 42 with combination skin that is super sensitive and hates just about everything I put on it.

    OSEA® Malibu
    26 seconds ago

    We love hearing stories like this. It’s why we do what we do! Thank you for being part of the OSEA community.

  • S
    Shari
    I recommend this product
    Rated 5 out of 5 stars
    3 days ago
    5 Stars

    Always a great product. It goes on evenly and works well!

  • ST
    Susan T.
    Verified Buyer
    I recommend this product
    What best describes your skin? Mature & Dry
    How old are you? 60+
    Rated 5 out of 5 stars
    6 days ago
    It Cannot Be Beat!

    I LOVE OSEA'S Hyaluronic Sea Serum! It feels luxurious when it goes on my face and makes my skin so firm and supple. You can't beat that when you're 74 years old!

  • C
    Carla
    Verified Buyer
    I recommend this product
    What best describes your skin? Oily & Blemishes
    How old are you? 25-34
    Rated 5 out of 5 stars
    1 week ago
    High humidity must have

    I live in an extremely humid area and I’ve been struggling to find a cream that moisturized, didn’t feel tacky, and didn’t break me out… couldn’t find one. I decided to try OSEA’s hyaluronic sea serum and seal it in with a facial oil instead of using a moisturizer and my skin has never felt or looked better. The best part is, not a single break out since beginning the new routine without any use of irritating actives.

  • G
    Gretchen
    Verified Buyer
    I do not recommend this product
    What best describes your skin? Normal & Combination
    How old are you? 35-44
    Rated 2 out of 5 stars
    1 week ago
    Like the other reviews recently - bad smell

    I have been buying this product for years and my last order had a TERRIBLE smell - I buy this specifically because I'm sensitive to parfum/fragrance and this is one of thier products that's fragrance-free.

    I've never smelled anything like this before with this product. I emailed them to ask for a refund or replacement and explanation if they changed anything. I really like this product so I'll be really bummed if the smell was due to a change. Hoping it was just a bad batch.

    OSEA® Malibu
    1 week ago

    Hi! We’re happy to share more about your Hyaluronic Sea Serum. Because we use naturally derived, ocean-inspired ingredients, including seaweed, without any added fragrance or essential oils, it’s normal for the scent and color to vary slightly from batch to batch. Seasonal changes and harvest variations in the seaweed can bring out certain natural notes more strongly, giving the formula a subtle, earthy scent. These variations are completely natural and do not affect the quality or effectiveness of the product! Our Customer Care team will be following up with you via email to better understand your experience and find a resolution.

  • K
    Kaylene
    I recommend this product
    Rated 5 out of 5 stars
    2 weeks ago
    5 Stars

    My skin loves this!

  • R
    Rebecca
    Verified Buyer
    I do not recommend this product
    What best describes your skin? Normal & Combination
    How old are you? 35-44
    Rated 2 out of 5 stars
    2 weeks ago
    Not one of my favorite Osea products

    The smell is mild, but unpleasant, and I don't love how it goes on or how my skin feels after. I used to use Osea's anti-aging serum which was amazing, my skin just felt great all the time, and since that got mysteriously discontinued and wiped from the Osea website, I've been trying their other products - I just don't know with this one - the putting on experience is sort of unpleasant, and I don't know if anything is happening. For now I'm using the Dream Night serum which is also not as good as the old anti-aging serum but at least it smells good - meanwhile exploring products from other brands, but I have yet to find something that compares to the Osea anti-aging serum.

    OSEA® Malibu
    2 weeks ago

    Thank you for your review Rebecca. We’re sorry to hear that the Hyaluronic Sea Serum wasn’t the perfect fit. Our team will be in touch directly, and just a reminder that we offer a 30-day money back guarantee for all products purchased on our website. Here's a link to our Returns Portal: https://returns.oseamalibu.com/#/

  • C
    Cyndi
    I recommend this product
    Rated 5 out of 5 stars
    3 weeks ago
    5 Stars

    Love it

  • J
    Jeremy
    I do not recommend this product
    Rated 1 out of 5 stars
    4 weeks ago
    1 Star

    It made me breakout

  • M
    Madilyn
    I recommend this product
    What best describes your skin? Normal & Combination
    How old are you? 25-34
    Rated 5 out of 5 stars
    1 month ago
    Love Love Love!

    I really love this stuff. I feel like it was what I was missing in my skin care! I used to wake up with dry flakey skin even after moisturizing at night, with this I don’t. I feel it helps me reach that extra level hydration in the desert dryness! Also makes my skin feel beautiful. I couldn’t tell at first if it was giving me a couple harmless whiteheads here or there but eventually they went away after a week or so. I also love the texture of this stuff.