Whey Protein

Whey Protein 1
Whey Protein 2
Whey Protein 3
Whey Protein 4
AKA: Milk Whey Protein, Lactalbumin
Synthetic
Skin Conditioner
Hair Care
Clean
Whey Protein is a polypeptide obtained from the fluid part of Milk after separation from curds.
CAS #
84082-51-9
Form
Powder
State
Solid
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.
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
Derived from dairy byproducts, whey protein became popular in skincare formulations in the late 20th century. Milk and dairy-based ingredients have been used in beauty treatments since ancient times, including Cleopatra's famous milk baths.
EWG
1
CIR
Safe as used
Pregnancy
Yes
CIR Safety Findings
Not a Sensitizer
medical-approval
all-shades-safe
Regulatory Status
USA✔ permitted
EU⚠ restricted
JAPAN⚠ restricted
CANADA⚠ restricted
Skin Types
●all-skin-types
Best For
Loss of Elasticity
Pregnancy & Breastfeeding Safe
Yes
The paper trail
🔬Peer-reviewed1 paper →
⚖️Regulatory1 listing →
🛡️Safety-assessed2 reviews →
Counts, not a verdict. A listing isn't a study. The trail, you decide.
Verified Jun 2026
Data: CosIng · EWG · CIR