What it does
- Hydrates and forms a light, conditioning film.
- Soothes and provides antioxidant, environmental support.
- Mineral- and polysaccharide-rich marine active.
How it works
Algae and seaweed extracts vary widely by species but are widely documented to contain water-binding polysaccharides, minerals and antioxidants that hydrate, soothe and protect. Composition and potency depend strongly on the species and grade.
Use level
- Typical use level
- extract typically 0.5–5%
Whole extracts are commonly used at 0.5–5% depending on species and grade.
Formulation considerations
- Choose a grade/species matched to your goal and phase.
- Composition varies widely by species; confirm the supplier specification.
- Generally gentle and broadly compatible.
What it pairs with & what to avoid
Pairs well with
- Hydrators and soothing actives
- Antioxidant systems
Use with care / avoid
- Assuming all algae extracts are equivalent
Regulatory status
Algae extract is listed in the EU CosIng database and is a well-established marine ingredient.
Common questions
What does algae extract do for skin?
It hydrates, soothes and provides antioxidant support, thanks to marine polysaccharides and minerals.
Are all algae extracts the same?
No; composition varies widely by species and grade.
What percentage of algae extract is used?
Whole extracts are typically 0.5–5%.