Sargassum thunbergii extract

AKA: Thunberg's Seaweed Extract

Plant-Derived

Preservative

Extract

Not Clean

OriginNative to East Asia. Sargassum thunbergii is a brown macroalga from the Sargassaceae family native to East Asian coastal waters. The extract is obtained through solvent extraction of the algal thallus.

Sargassum Thunbergii Extract is the extract of the alga, Sargassum thunbergii, Sargassaceae.

Family

Sargassaceae

Plant Part

Thallus

Form

Liquid

Skin Types

●all-skin-types

Best For

Dullness

Pregnancy & Breastfeeding Safe

Yes

Functions

Antimicrobial

Keeps your product from growing bacteria, mold, or yeast. Without these, that jar of cream becomes a petri dish in about a week.

Fights Bacteria

The paper trail

🔬Peer-reviewed1 paper →

⚖️Regulatory0 listings

🛡️Safety-assessed1 review →

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

EWG

CIR

Safe as used

Pregnancy

Yes

Concentration Guide

CIR lists it as not reported to be in use.

CIR · report published 2026

Regulatory Status

USA✔ permitted

EU⚠ restricted

JAPAN⚠ restricted

CANADA⚠ restricted

Regulatory Agencies

EWG CIR FDA EU COSING Health Canada

Verified Jun 2026

Data: CosIng · EWG · CIR