Tyrosine
AKA “L-tyrosine, 60-18-4, (S)-Tyrosine, p-Tyrosine, (2S)-2-amino-3-(4-hydroxyphenyl)propanoic acid, L-p-Tyrosine, 4-Hydroxy-L-phenylalanine, tirosina, Tyrosinum
Skin Conditioning
Ingredient Facts
Tyrosine
AKA: L-tyrosine, 60-18-4, (S)-Tyrosine, P-Tyrosine, (2S)-2-amino-3-(4-hydroxyphenyl)propanoic acid, L-p-Tyrosine, 4-Hydroxy-L-phenylalanine, Tirosina, Tyrosinum
Skin Conditioning · Antistatic · EWG: 1
Synthetic
Skin Conditioner
Hair Care
Amino Acid
Clean
2-Amino-3-(4-hydroxyphenyl)propanoic acid
Solubility 479
Formula
C9H11NO3
Mol. Weight
181.19
CAS #
556-02-5, 556-03-6, 60-18-4
State
Solid; [Merck Index] White fine crystals and fragments; [Sigma-Aldrich MSDS]
See origin →
Functions
Antistatic
Hair Conditioning
A catch-all term for ingredients that improve how skin looks and feels — softer, smoother, more supple. The workhorse behind most moisturizers.
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
An amino acid first isolated in 1846. In modern skincare, tyrosine is used for its role as a precursor to melanin and catecholamines, but it has no significant traditional cosmetic history; its use in cosmetics is based on 20th-century biochemical research.
Skin Types
all-skin-types
Best For
General
Pregnancy & Breastfeeding Safe
Yes
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not Phototoxic
medical-approval
all-shades-safe
Regulatory Status
USApermitted
EUrestricted
JAPANrestricted
CANADArestricted
Verified Jun 2026
Data: PubChem · CosIng · EWG · CIR