whey protein

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.

References for this information:

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

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