Biosaccharide Gum-4
AKA “Biosaccharide Gum-4, Fermented Polysaccharide
Synthetic
Ingredient Facts
Biosaccharide gum-4
AKA: Fermented Polysaccharide
Synthetic · Humectant · EWG: 1
Plant-Derived Synthetic
Humectant
Skin Conditioner
Synthetic
Clean
A natural conditioning agent derived from fermentation that helps soften and smooth skin, leaving it feeling hydrated and supple.
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.
Humectant
A moisture magnet. Pulls water from the air and deeper skin layers up to the surface to keep skin plump and hydrated.
Viscosity Controlling
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
Melanin-Rich Skin
Suitable
Pregnancy & Breastfeeding Safe
Yes
EWG
1
CIR
Insufficient
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
USAunder review
EUrestricted
JAPANrestricted
CANADArestricted
Verified Feb 2026
Data: CosIng · EWG · CIR