Dimethiconol Cysteine
AKA “Silicone-Amino Acid Complex, Dimethiconol Cysteine
Hair Conditioning
Ingredient Facts
Dimethiconol cysteine
AKA: Silicone-Amino Acid Complex
Hair Conditioning · Hair Conditioning · EWG: 1
Synthetic
Skin Conditioner
Hair Care
Amino Acid
Silicone
Clean
Dimethiconol Cysteine is the reaction product of dimethiconol and cysteine
Form
Powder
See origin →
Functions
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
Conditions Hair
Softens and detangles hair
Traditional Use
A modern silicone-amino acid hybrid developed for cosmetics. Combines silicone's conditioning properties with cysteine, an amino acid important in skin structure, created to improve hair and skin conditioning in contemporary formulations.
Skin Types
all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: CosIng · EWG · CIR