Cystoseira amentacea/caespitosa/branchycarpa extract

AKA: Brown seaweed extract, Cystoseira extract

Plant-Derived

Skin Conditioner

Marine

Extract

Not Clean

Cystoseira Amentacea Extract

Family

Fucaceae

Plant Part

Whole Plant

Form

Liquid

Functions

Skin Conditioning

A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.

Locks in moisture

Traditional Use

Derived from brown seaweeds traditionally used in Atlantic and Mediterranean coastal regions for nutritional and medicinal purposes. Modern skincare applications leverage their iodine, polysaccharides, and mineral content for hydration and firming properties.

EWG

CIR

Safe as used

Pregnancy

Yes

CIR Safety Findings

medical-approval

all-shades-safe

Moderate Irritant

Regulatory Status

USA✔ permitted

EU⚠ restricted

JAPAN⚠ restricted

CANADA⚠ restricted

Regulatory Agencies

EWG CIR FDA EU COSING Health Canada

Skin Types

●all-skin-types

Best For

Soothing

Pregnancy & Breastfeeding Safe

Yes

The paper trail

🔬Peer-reviewednone on file

⚖️Regulatory1 listing →

🛡️Safety-assessed2 reviews →

Counts, not a verdict. A listing isn't a study. The trail, you decide.

Verified Jun 2026

Data: CosIng · EWG · CIR