Whey Protein



Whey Protein description

Whey protein is a form of protein derived from milk. An animal-derived ingredient, whey protein functions as a hair-conditioning and skin-softening agent.

Whey Protein references

  • Cosmetic Ingredient Review, April 2017, pages 1-18
  • World Scientific News, 2017, pages 448-456
  • Journal of Food Science and Technology, November 2015, pages 6,847-6,858

Peer-reviewed, substantiated scientific research is used to assess ingredients in this dictionary. Regulations regarding constraints, permitted concentration levels and availability vary by country and region.

Ingredient ratings


Proven and supported by independent studies. Outstanding active ingredient for most skin types or concerns.


Necessary to improve a formula's texture, stability, or penetration.


Generally non-irritating but may have aesthetic, stability, or other issues that limit its usefulness.


There is a likelihood of irritation. Risk increases when combined with other problematic ingredients.


May cause irritation, inflammation, dryness, etc. May offer benefit in some capability but overall, proven to do more harm than good.


We couldn't find this in our ingredient dictionary. We log all missing ingredients and make continuous updates.

Not rated

We have not yet rated this ingredient because we have not had a chance to review the research on it.