Whey Protein
A milk protein. It hydrates and forms a softening film on skin. Well tolerated.
Evidence by route
Topical application
A hydrating protein. Safe.
- CIR Cosmetic Ingredient Review safety assessment
How to read tiers A–F
- BLimited evidence. One RCT or several controlled studies with limitations
Tolerability and safety
- Irritation potential
- Low
- Allergen risk
- Low
- Pregnancy
- Safe
- Suitable for
- Normal, Dry, Combination, Oily, Sensitive
About this ingredient
Whey protein (INCI Whey Protein) is a set of milk proteins. In a formula it hydrates and forms a softening film on the skin, common in moisturizers and conditioners. This is a surface-hydration and texture component, not a corrective active. It draws water and leaves skin softer to the touch but does not repair the barrier or work in depth. It does the job as support, without marked corrective effects. Applied topically it is not systemically relevant, so it can be used during pregnancy and breastfeeding without issue. Tolerability is good. Irritation and allergy potential are both low, suitable for sensitive skin. If you have a known milk protein allergy, it is worth checking the formula before use. There is no data on relevant comedogenicity.
Frequently asked questions
Is Whey Protein safe during pregnancy?
Whey Protein is considered safe during pregnancy at typical cosmetic concentrations. Systemic absorption through the skin is minimal.
What skin types is Whey Protein for?
Whey Protein suits: normal, dry, combination, oily, sensitive.
What is Whey Protein and what does it do in cosmetics?
A milk protein.
What's the INCI name for Whey Protein?
The INCI name is Whey Protein. It may also appear as: Lactis Protein.
See Whey Protein in a product composition right on the store page
The Evigrade extension adds an evidence panel to iHerb, Sephora, Druni and 12 more stores. This ingredient and every other one in the product show evidence-tier, allergen risk and pregnancy/lactation flags at a glance.
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