INCI names HYDROLYZED SILK
CAS number 96690-41-4
Hydrolyzed Silk is a popular ingredient in hair care products, known for its ability to strengthen and enhance shine by delivering essential amino acids to the hair shaft. It is also used in skincare due to its hydrating properties and ability to protect the skin from environmental stressors. Found in shampoos, conditioners, and lotions, Hydrolyzed Silk closely resembles the proteins naturally present in hair and skin, making it highly effective in restoring lost proteins that contribute to dryness and damage.
Purpose
Hydrolyzed Silk is a multifunctional ingredient widely used in personal care products. It acts as a hair conditioner, strengthening strands, enhancing smoothness, and adding shine by replenishing lost proteins. As a humectant, it helps retain moisture, preventing dryness and keeping both hair and skin hydrated. Additionally, its skin conditioning properties create a protective barrier, improve texture, and boost elasticity, making it a valuable ingredient in skincare formulations.
Origin
Hydrolyzed Silk comes from discarded silkworm cocoons. Manufacturers extract the purest silk protein, purify and degum it, then refine it. A controlled hydrolysis process then transforms it into Hydrolyzed Silk protein.In its raw state, this ingredient appears as an amber-colored liquid with a mild, distinctive odor.
| Feature | Description |
| Name | Hydrolyzed Silk |
| Type | Protein derivative |
| Source | Derived from silk fibers (silkworm cocoon) |
| Concentration | 0.5%–5% |
| Boiling point | 215°F (101.6°C) |
| Physical state | Liquid or powder |
| Odor | Mild to slightly characteristic |
| Color | Pale yellow to amber |
| Solubility | Water-soluble |
| PH | 4.0-5.5 |
Rich in Essential Amino Acids
Hydrolyzed Silk is composed of small protein molecules, including serine, glycine, and alanine, which closely mimic the natural proteins found in hair and skin. These amino acids help repair damage, enhance elasticity, and improve overall strength.
Deep Hydration & Moisture Retention
Acting as a powerful humectant, Hydrolyzed Silk attracts and retains moisture, preventing dryness and brittleness. It creates a protective barrier that locks in hydration, making both hair and skin feel softer and more nourished.
Lightweight & Easily Absorbed
Due to its low molecular weight, Hydrolyzed Silk penetrates deeply into hair shafts and skin layers without leaving a greasy or heavy residue. This makes it highly effective in conditioning without buildup.
Enhances Shine & Smoothness
Hydrolyzed Silk helps to smooth the hair cuticle, reducing frizz and enhancing natural shine. In skincare, it contributes to a silky texture, leaving the skin feeling soft and velvety.
Strengthens & Protects Hair
By reinforcing the hair structure, Hydrolyzed Silk reduces breakage, split ends, and damage caused by heat styling, chemical treatments, and environmental stressors. It fortifies weakened hair strands, improving resilience.
Creates a Protective Barrier for Skin
This protein forms a breathable, invisible film over the skin, shielding it from pollutants, UV damage, and harsh environmental conditions. It helps maintain a healthy skin barrier while preventing moisture loss.
Biocompatible & Gentle
Since Hydrolyzed Silk closely resembles the proteins naturally found in human hair and skin, it is highly compatible with the body’s biology. This makes it suitable for all skin and hair types, including sensitive or damaged conditions.
Versatile & Widely Used
Hydrolyzed Silk is found in a variety of personal care products, including shampoos, conditioners, leave-in treatments, serums, body lotions, facial creams, and even luxury skincare formulations. Its multifunctional benefits make it a premium ingredient in high-quality cosmetics.
Applications of Hydrolyzed Silk
Hair Care
- Found in shampoos, conditioners, hair masks, and leave-in treatments to strengthen, smooth, and hydrate hair.
- Used in anti-frizz and heat-protectant sprays to improve manageability and protect against styling damage.
- Added to hair serums and treatments for enhanced shine and moisture retention.
Skincare
- Included in face creams, serums, and lotions to improve skin hydration, elasticity, and smoothness.
- Used in anti-aging formulations to help maintain a youthful appearance by reducing dryness and fine lines.
- Found in body lotions and hand creams for enhanced softness and long-lasting moisture.
Cosmetic & Makeup Products
- Used in foundations and primers for a silky, smooth application and added hydration.
- Found in BB creams and tinted moisturizers to improve skin texture and provide lightweight conditioning.
- Added to lip care products like balms and glosses to prevent dryness and chapping.
Personal Care & Bath Products
- Common in luxury soaps and body washes for a soft, nourishing cleanse.
- Found in shaving creams to provide a smoother glide and reduce irritation.
- Used in bath soaks and body scrubs to maintain hydration and prevent dryness.
Professional & Salon Treatments
Added to keratin and protein treatments to repair damaged hair and enhance hair strength.
