OSEA was founded in Malibu in 1996 by Jenefer Palmer, inspired by her grandmother Elsa’s belief in the restorative power of the ocean. Drawing on multigenerational female healing traditions, OSEA crafts clean, seaweed‑infused skincare using thoughtfully sourced ingredients, climate‑positive packaging, and uncompromising transparency.
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OSEA Hyaluronic Acid Sea Serum
1 oz
Why we love it
- Free from 3,000+ banned ingredients and meets our EU-informed standards.
- Instantly increases hydration for a fresh-faced glow.
- Firming properties strengthen skin's natural moisture barrier.
- Clinically tested for anti-aging, made with Earth-friendly ingredients.
Free carbon neutral shipping on orders $29+. Arrives in 3–5 days. Free, easy 30-day returns.
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*:
- 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).
Star Ingredients
Water / Aqua / Eau, Codium Fragile Extract, Betaine, Sodium Hyaluronate, Tremella Fuciformis Sporocarp Extract, Bacillus Ferment, Hydrolyzed Hyaluronic Acid, Glycerin, Sodium Benzoate, Potassium Sorbate, Citric Acid, Lonicera Japonica (Honeysuckle) Flower Extract, Lonicera Caprifolium (Honeysuckle) Flower Extract, Sodium Copper Chlorophyllin.
Please be aware that ingredient lists may change or vary from time to time. Please refer to the ingredient list on the product package you receive for the most up-to-date list of ingredients.
After cleansing, apply Hyaluronic Sea Serum over skin. Allow to absorb. Seal in with OSEA moisturizer of your choice. Use morning and night.
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We’ll send multiple reminders before subscriptions ship.
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Easily edit, reschedule, or cancel right up until your order ships.
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Better for the planet
Subscriptions ship together to reduce packaging and carbon emissions.
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Seaweed skincare rooted in family wisdom
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