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Collagen protein is one of the most abundant proteins in the bodies of mammals, accounting for about 25%-30% of the total protein content. It is primarily found in the skin, bones, teeth, internal organs, and eyes. Collagen protein is an essential structural protein that plays a critical role in supporting organs and protecting the body. In recent years, with advancements in collagen protein extraction and processing technology, research into its properties, structure, and functions has deepened. Collagen protein is becoming a research hotspot in fields such as medicine, health foods, and cosmetics.
Currently, the collagen protein used in health foods and cosmetics is mostly its hydrolyzed product—hydrolyzed collagen protein. Hydrolyzed collagen protein, also known as collagen peptides, is a powdered product made from purified and enzymatically degraded animal collagen protein, followed by processes such as filtration, concentration, and spray drying. Its color is generally white or light yellow, and it mainly consists of peptides with molecular weights between 500-20,000 Daltons.
Compared to non-hydrolyzed large-molecule collagen, hydrolyzed collagen protein has significant advantages in digestion, absorption, nutrition, and functional properties. Numerous studies have confirmed that hydrolyzed collagen protein is highly effective in skin health, enhancing bone strength, inhibiting blood pressure rise, protecting the stomach lining, and antioxidation. Hydrolyzed collagen protein has already become the new favorite in the health food and cosmetics fields.
As an innovative cosmetic ingredient, collagen protein has good care effects on human skin and hair. In countries like the United States, Germany, and Japan, many high-end cosmetics contain collagen protein, with some even involving collagen protein injections in the facial area to improve skin texture and reduce wrinkles. In the United States CTFA (Cosmetic, Toiletry and Fragrance Association) Cosmetic Ingredient Handbook, natural substances include collagen protein or its hydrolyzed products.
Using collagen protein in cosmetics can provide essential nutrients to the skin, replenish various amino acids, enhance the activity of skin collagen protein, maintain the moisture in the stratum corneum and the integrity of fiber structures, improve the living environment of skin cells, and promote the metabolism of skin tissue.
Additionally, collagen protein molecules contain a large number of hydrophilic groups, giving it excellent moisturizing effects, and it can achieve the goal of keeping the skin moist. When the concentration of collagen protein added to cosmetics reaches 0.01%, it can supply all the moisture needed by the skin.
Adding collagen protein to cosmetics also helps regulate and stabilize the pH value, stabilize foam, and emulsify colloids. Moreover, as a functional ingredient, collagen protein can reduce the damage caused by various surfactants, acids, bases, and other irritating substances to the skin and hair.
To ensure the absorption effect on the skin, collagen protein used solely as a nourishing skincare ingredient usually requires a molecular weight below 2KD so that hydrolyzed collagen protein can penetrate the skin. For hair care products, besides the moisturizing effect, hydrolyzed collagen protein generally needs a certain film-forming ability, hence a higher requirement for the molecular weight of hydrolyzed collagen protein.
In summary, due to the mild performance, diverse functionality, and high safety of collagen-based cosmetics, meeting the trends of contemporary cosmetics, they have developed rapidly in recent years and are gradually becoming market favorites.
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