Seaweed: Our Signature Ingredient for Your Best Skin

Marine algae, known more commonly as seaweed, is more than just a salty snack. Seaweed is a superstar of the clean skincare world. With skin-supportive antioxidants and the ability to deliver mineral rich hydration, seaweed is the not-so-secret in...

Marine algae, known more commonly as Seaweed, is more than just a nutrient-dense superfood. Seaweed is a superstar of the clean skincare world. Packed with minerals, antioxidants, amino acids and omega-3 fats, Seaweed is the not-so-secret ingredient of our plant-based OSEA formulas. But how exactly do we harness the power of the sea? Read on for everything you need to know about our signature ingredient.

The Basics


Marine algae is a member of the Protista kingdom, so while Seaweed has many plant-like attributes, i.e. using chlorophyll for photosynthesis, it is not technically a plant. Seaweed is found in salt water and is essential to the dynamic marine ecosystem, providing food and shelter for all kinds of sea creatures. Seaweed is typically classified as one of three groups: brown, red or green algae. You’ll find mostly brown and red algae in our products.

Meet our Seaweeds


Our superfood Seaweeds when combined with plant-derived ingredients like botanical oils, Hyaluronic Acid, Peptides and Vitamin C create skin-loving, ultra-hydrating formulations. Each Seaweed has unique benefits. Keep scrolling to find the best fit for you!

Undaria Seaweed

Undaria pinnatifida is a brown algae, rich in nutrients like sodium, iron, potassium, calcium and vitamins B1, B2, B3, B6, and B12. Undaria, when combined with botanical oils helps to nourish the moisture balance of the skin. Undaria also contains Fucoidan, a genius hydrating compound.

Undaria Algae Body Oil

Undaria Seaweed combines with eleven botanical oils, including Acai and Passion Fruit for serious hydration and baby-soft skin that glows. Also nice: The subtle Cyprus scent makes for a soothing sensory experience.



Gigartina Seaweed

Gigartina skottsbergii is a red marine algae with hydrophilic (moisture attracting) properties. Gigartina is also abundant in sulfated polysaccharides, which act like antioxidants. (Yes, please!)

Advanced Protection Cream

Our ultra rich Advanced Protection Cream with Gigartina plumps the look of fine lines and wrinkles while creating a cushiony barrier for dry skin. This mega moisturizing cream also contains Squalane to help lock in essential hydration.



Macrocystis Seaweed

Macrocystis pyrifera, also known as Giant Bladder Kelp, is the largest of all marine algae. This hefty Seaweed contains high levels of iodine, omega-3 and omega 6 fatty acids, vitamins and minerals.

Blemish Balm

Our fast-absorbing, clarifying moisturizer helps to promote an even skin tone. The secret lies in the synergy between three seaweeds, including Macrocystis and Tea Tree, Juniper and Thyme essential oils. Bonus: Blemish Balm is infused with featherweight Jojoba oil to balance without drying.



Still not sure which seaweed is right for you? Take our Skin Quiz to find a skincare ritual just for you.