Hydrolyzed Silk Protein

Hydrolyzed Silk Protein, also called Silk Amino Acids or Hydrolyzed Silk, is a luxurious cosmetic ingredient extracted from silk fibers and broken into very small peptides so it becomes water-soluble and easy to absorb.

What Hydrolyzed Silk Protein Is

• Silk fiber proteins (fibroin and sericin) broken down through hydrolysis

• Results in tiny silk peptides or amino acids

• Water-soluble and clear

• Lightweight and non-sticky

Silk proteins naturally contain serine, a strong moisturizing amino acid.

Benefits for Hair

1. Strengthens hair – small peptides penetrate the cuticle and improve tensile strength

2. Reduces breakage – forms a light protective film over each strand

3. Adds shine – silk molecules reflect light for a glossy effect

4. Improves slip – makes hair smoother and easier to detangle

5. Moisturizes – holds water and prevents dryness

Benefits for Skin

• Acts as a humectant and improves moisture

• Makes skin feel smooth and silky

• Strengthens the skin barrier

• Leaves a thin, soft film that reduces moisture loss

Typical Usage Rates

• Toners / essences: 0.5–2%

• Lotions: 1–3%

• Creams: 1–5%

• Shampoo / conditioner: 1–3%

• Leave-in sprays: 0.3–1%

• Hair serums: 0.3–2%

Formulation Tip

Add in the cool-down phase below 40°C. Heating above 45–50°C destroys the protein structure. Works best in pH 4.0–7.0.

Forms Available

1. Hydrolyzed silk liquid – clear, watery, easiest to use

2. Silk amino acids powder – stronger concentration, dissolves in water

Skin Feel and Texture

• Lightweight

• Silky finish

• Slight softening feel

• Improves spreadability in creams and serums