Milk Protein

Milk protein is a blend of casein- and whey-derived peptides sourced from dairy, used for conditioning aesthetics and a moisture-retentive feel in skincare, though evidence for notable topical activity beyond sensory effects is limited.
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Ingredient Snapshot

Overview
A dairy-derived protein that leaves skin feeling soft and cushioned.
Category
Skin Conditioning, Hydration
Type
Peptide

Ingredient Ratings

Overall Rating

Fair

Comedogenic Risk

None

Skin Benefits

Leaves skin feeling cushioned and smooth with a soft afterfeel, though any meaningful skincare effects beyond improved feel are not well supported by strong evidence.

Uses In Skincare & Cosmetics

Included in moisturizers, serums, and wash-off masks aimed at comfort; sometimes added to gentle cleansers for a conditioned finish.

Comedogenic Rating

This ingredient is not typically evaluated for comedogenicity, and no standardized rating is available.

Safety

Avoid if you have a known cow's milk allergy, as proteins can provoke irritation or allergic responses. Patch testing is advisable, particularly on compromised or sensitive skin. No broad cosmetic-use restrictions are commonly noted.

Is Milk Protein a Good Ingredient?

The topical benefits beyond improved feel are weakly supported and mostly sensory rather than clinically strong, which is why it rates Fair. As a dairy-derived protein, it can also trigger irritation or allergy in those sensitive to milk proteins.

Products with Milk Protein

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