Sargassum thunbergii extract
AKA “Thunberg's Seaweed Extract
Extract
Ingredient Facts
Sargassum thunbergii extract
AKA: Thunberg's Seaweed Extract
Extract · Antimicrobial · EWG: 4
Plant-Derived
Preservative
Extract
Not Clean
Sargassum Thunbergii Extract is the extract of the alga, Sargassum thunbergii, Sargassaceae.
Family
Sargassaceae
Plant Part
Thallus
Form
Liquid
See origin →
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
Traditional Use
A brown seaweed with a long history of use in Traditional Chinese Medicine and Japanese herbalism. Traditionally used as a nutritive and therapeutic ingredient.
Skin Types
all-skin-types
Best For
Dullness
Pregnancy & Breastfeeding Safe
Yes
EWG
4
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
medical-approval
all-shades-safe
Moderate Irritant
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: CosIng · EWG · CIR