Article last updated: October 15, 2024
Whey, often referred to as milk serum or milk plasma, is the liquid portion of milk that remains after the curdling and straining process during cheese production. This ingredient is a water-dispersible component rich in proteins, lactose, vitamins, and minerals. Historically, whey was considered a byproduct of cheese-making and was often discarded or used as animal feed. However, its nutritional and functional properties have led to its incorporation into various industries, including cosmetics.
The journey of whey into the realm of skincare and beauty products is relatively recent. Initially recognized for its nutritional benefits, scientists and formulators began to explore its potential in topical applications. The proteins and peptides in whey are known for their skin-conditioning properties, which can help improve the texture and appearance of the skin. This discovery paved the way for whey to be included in a variety of cosmetic formulations, from creams and lotions to serums and masks.
The production of whey involves several steps. First, milk is pasteurized and then inoculated with specific bacteria to initiate fermentation. This process causes the milk to separate into solid curds and liquid whey. The curds are used to make cheese, while the whey is collected and further processed to remove any remaining fats and impurities. The resulting liquid is then either used as-is or dried into a powder form for easier incorporation into cosmetic products.
In this section, we will delve into the officially recognized cosmetic benefits and uses of Whey:
Whey is primarily known for its skin conditioning properties. This means that it helps to maintain the skin in good condition. When used in cosmetic formulations, Whey can enhance the appearance of dry or damaged skin by reducing flaking and restoring suppleness. Essentially, it acts as a moisturizer, helping to keep your skin hydrated and smooth.
Note: the listed benefits above are exclusively based on the officially recognized and defined functions of the ingredient, as documented by the International Nomenclature of Cosmetic Ingredients (INCI).
Whey is generally considered safe for topical application in cosmetic products. However, like any ingredient, it may cause side effects in some individuals. Here are some potential side effects of using whey on the skin:
Regarding individuals who are pregnant or breastfeeding, data and research on the topical usage of whey during pregnancy are lacking. Therefore, it is advisable for pregnant or breastfeeding women to consult a healthcare professional for further advice before using products containing whey.
Adverse reactions to whey are relatively uncommon, but they can occur, especially in individuals with a known allergy to dairy products. To minimize the risk of adverse reactions, it is recommended to perform a patch test before widespread usage of any new product containing whey.
Whey has a comedogenic rating of 1, which means it is considered to be low on the scale of pore-clogging potential. This makes it a relatively safe option for individuals prone to acne, blemishes, or breakouts, as it is unlikely to contribute to clogged pores.
