Biosaccharide Gum-4
AKA “Biosaccharide Gum-4, Fermented Polysaccharide
Skin Conditioning
Ingredient Facts
Biosaccharide gum-4
AKA: Fermented Polysaccharide
Skin Conditioning · Skin Conditioning · EWG: 1
Plant-Derived Synthetic
Skin Conditioner
Clean
Biosaccharide Gum-4 is a fermentation gum derived from sorbitol. It is a deacetylated branched polymer consisting of L-fucose, 2-D-glucose and glucuronic acid repetitive units
Effective at 3.0%
CAS #
905593-86-4
See origin →
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
A synthetic polysaccharide created through fermentation and biotechnology in the late 20th century. Developed as a skin-conditioning and hydrating agent in modern skincare formulations.
Skin Types
all-skin-types, gentle
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
ewg-1
medical-approval
pregnancy-nursing-safe
all-shades-safe
Concentration Guide
0.0004%
6.0%
0%8%
Effective Range
CIR reported use: 0.0004-0.5 | 0.002-6
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: CosIng · EWG · CIR