Soy Protein Hydrolysate Gerard's Cosmetic 1 L

Why Soy-Derived Protein Fragments Remain a Staple in Hair and Skin Formulation

Soy Protein Hydrolysate from Gerard's Cosmetic, supplied in a 1 liter volume, suits studio-scale and small commercial cosmetic production where formulators need a reliable stock of active ingredient for recurring batches of shampoos, conditioners, creams and treatment masks. This ingredient belongs to the Hydrolyzed Proteins category, which brings together water-soluble protein fractions obtained by breaking down natural raw materials into smaller, more bioavailable pieces that can actually penetrate the upper layers of skin and the hair shaft rather than simply sitting on the surface.

The strongest global demand for soy protein hydrolysate comes from hair care manufacturing: shampoos, conditioners, leave-in sprays, masks and styling serums all rely on it as a conditioning and film-forming agent. It smooths the cuticle, reduces static, and gives hair a fuller, denser feel after washing. Hair weakened by coloring, bleaching or heat styling responds particularly well to soy-derived amino acids, since they can partially compensate for protein loss in damaged sections of the shaft. In skincare, soy protein hydrolysate appears in facial and body creams, lotions and serums thanks to its moisturizing and softening qualities, along with its ability to form a light film that helps retain moisture and reduce water loss through the skin. Color cosmetics and body care lines also use it to improve the sensory feel of a product during application. Beyond cosmetics, hydrolyzed soy protein occasionally finds use in specialized food supplement production and in certain household chemical formulas, where it contributes to a softer skin-feel after contact with a surface.

Handling this raw material is straightforward: it is typically added to the water phase of an emulsion during the cooling stage, at a temperature not exceeding 40-45 degrees Celsius, to avoid breaking down the protein chains under heat, although it can also be added to a finished cold-process formula. Recommended usage rates run from 1 to 5 percent of total product weight, depending on the desired intensity of the conditioning effect and the type of finished product — leave-in formulas usually call for a lower percentage, while intensive repair masks can use more. Soy protein pairs well with other botanical hydrolysates, such as Grape Seed Hydrolysate, which adds antioxidant support, or Horse Chestnut Fruit Hydrolysate, known for its toning action on skin and micro-circulation. For formulas that need a pronounced film-forming and texturizing quality, soy protein is often combined with Cetraria Polysaccharide Hydrolysate, which adds body and a well-groomed finish to both skin and hair. Store the hydrolysate in a tightly sealed container, away from direct sunlight and temperature swings, and limit prolonged exposure to air once the container has been opened.

Repair Leave-In Serum with Soy Protein

Distilled water 600 g

Olivem 1000 emulsifier 30 g

Jojoba oil 25 g

Cetyl alcohol 20 g

Soy Protein Hydrolysate 45 g

Panthenol 15 g

Preservative 8 g

Fragrance 5 g